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Lyu, S., D. Rockmore i H. Farid. "A digital technique for art authentication". Proceedings of the National Academy of Sciences 101, nr 49 (24.11.2004): 17006–10. http://dx.doi.org/10.1073/pnas.0406398101.
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Thomas, Reji, Vibisha V, Tabassum A i Thanuja S. "Digital Watermarking". International Research Journal of Computer Science 10, nr 05 (23.06.2023): 124–29. http://dx.doi.org/10.26562/irjcs.2023.v1005.04.
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The paper introduces the digital watermarking technology which is a data hiding technique that embeds a message into a multimedia work such as an image or text or other digital object. The proposed technique has several important applications; the majorly important is the digital copyrights protection. The digital watermarking system as any other data hiding technique has its own requirements that make the digital watermark strong as possible. Technologies of digital watermarking are mainly classified depending on their domain to spatial domain watermarks, Watermarks belonging to frequency (transform) domain and wavelet domain watermarks. The digital watermarks suffer from different types of attacks that include either state-of-the-art watermarking attacks or watermark estimation attacks. The recovery from these attacks requires strong detection techniques; the digital watermark agent provides a professional solution for these attacks.
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Nekrasov, Dmitry Yurievich. "Fractal graphic as digital objectless art". Journal of Flm Arts and Film Studies 6, nr 1 (15.03.2014): 68–76. http://dx.doi.org/10.17816/vgik6168-76.
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This article analyses the phenomenon of digital computer graphics, based on mathematical calculations, and possibilities of using it in different modern art techniques. Digital fractal patterns are irregular, self-similar structures, which are based on natural objects' group of similar characteristics, such as: corals, starfishes, sea urchins, snowflakes, crowns of the trees. The principle of such image shaping is natural, so its worthwhile to trace down it's digital mathematic simulation. Contrary to digital graphic and painting, fractal graphic does not base on classic art traditions. The closest to the fractal graphics are objectless ornamental traditions, inheriting principles of infinite spatial creation of similar groups. The article includes the comparison of general ornamental rules and features of fractal images. Due to the fact that modern computer software allows to create the digital fractal graphics without special mathematical skills, an artist can combine traditional and digital painting and abstract fractal graphic to reach that level of balance and fortuity of an image, that abstract artist has tried to get, using traditional techniques. The fractal graphic is examined as a digital counterpart of traditional painting technique of monotyping in complex art work. Author underlines the likeness of many digital and material ways of creating images. Finally, the visual language of a piece of art still remains more important, than technological details of its production.
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Asare, Samuel, Priscilla Walden, Eric Aniagyei i Mensah Emmanuel. "A Comparative Study of Traditional Art Techniques versus Digital Art Techniques in the Context of College Visual Art Education". American Journal of Arts, Social and Humanity Studies 3, nr 1 (10.08.2023): 21–34. http://dx.doi.org/10.47672/ajashs.1556.
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This comparative study explores the efficacy of traditional art techniques versus digital art techniques within the framework of college visual art education. The purpose of this study is to examine the impact of these two distinct approaches on students' learning outcomes, creative expression, and skill development. By employing a qualitative methodology, this research delves into the experiences and perceptions of students and educators, seeking to identify the strengths and limitations of each technique. The study's findings reveal nuanced insights into the multifaceted nature of art education, highlighting the benefits and challenges associated with traditional and digital methods. The study draws upon constructivist learning theory as the theoretical foundation, emphasizing the role of active engagement and hands-on experience in the learning process. This theory informs the investigation by guiding the exploration of how students construct knowledge and develop artistic skills through different techniques. The validation of the constructivist theory in the study is achieved through thematic analysis of qualitative data, wherein patterns and themes emerge from student and educators’ interviews. The research highlights the significance of a balanced approach to art education, recognizing the value of both traditional and digital techniques. It recommends that practitioners integrate a variety of methods to cater to diverse learning styles and preferences, fostering holistic artistic development. Moreover, the findings offer recommendations to educators to create an inclusive and adaptable curriculum that facilitates the exploration of both traditional and digital mediums. In the context of policy implications, this study underscores the need for flexible policies that support the integration of digital tools and resources in art education while preserving the essential foundations of traditional techniques. Policymakers are encouraged to promote professional development opportunities for educators, ensuring they are equipped to effectively teach and mentor students in both traditional and digital realms.
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Leone, Massimo. "Digital Cosmetics". Chinese Semiotic Studies 16, nr 4 (25.11.2020): 551–80. http://dx.doi.org/10.1515/css-2020-0030.
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AbstractThe earliest extant depictions of the human face are not simply realistic but represented through specific technologies (means) and techniques (styles). In these representations, the face was probably idealized in order to empower its agency through simulacra. The history of art sees humans become increasingly aware of the impact of technology and technique on the production of visual representations of the face. With photography, and even more so with its digital version, technology is developed, hidden, and miniaturized so as to democratize and market technique. The result, however, a naturalization of technology, is increasingly problematic in the era of algorithms: artificial intelligence absorbs the social bias of its engineers. This is particularly evident in the domain of “digital cosmetics”: successful apps are used to process and share billions of facial images, yet few critically reflect on the aesthetic ideology underpinning them. This is an urgent task for visual, social, and cultural semiotics.
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Kennedy, Hailey, i Hugh McKenzie. "Art and Archaeology". Pathways 4, nr 1 (30.12.2023): 27–44. http://dx.doi.org/10.29173/pathways50.
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Observational skills provide the foundation for both drawing and archaeological techniques. Drawing was frequently employed within archaeology as a recording technique or to produce technical illustrations for published academic papers. However, in recent years the widespread use and adoption of digital photography and 3D imagery has resulted in a decline of its use and such skills are now only briefly considered in archaeological teaching as practical and worthwhile endeavors. This paper considers the role drawing can have within archaeology and suggests that drawing is a useful tool to aid in critical observation. With the integration of specialist interviews, an art workshop experiment was created. This workshop experiment was created to explore drawing as a learning technique in which to aid in developing the observational skills of undergraduate archaeology students. The results of this study suggest that drawing is a useful mode of observation, one that enables researchers to gain a deeper understanding of what they observe, that it can be used to see.
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Sookkaew, Jirawat, Phanom Chongkon i Nakarin Chaikaew. "Technology of Digital Art for Adapting Ancient Visual Art Designs". International Journal of Emerging Technology and Advanced Engineering 12, nr 8 (2.08.2022): 125–35. http://dx.doi.org/10.46338/ijetae0822_16.
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Visual arts, design, and the creation of visual arts have been beginning along with human life for a long time. They have evolved in parallel together. The creation of human visual art is driven by inspiration and driven and taken to be a visual artwork. Creating digital art is a prevalent tool in today's era. It is a creative art technique that combines digital technology and the creation of visual artworks together. Bringing the cultural value of art that is the heritage of our ancestors who have created art that is considered valuable for future generations by using digital art for inheritance. It is also considered another method of transmitting, disseminating, and bringing the values of these cultural arts and cultures to be able to be inherited and passed on to the next era
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Chu, Zichen, i Bo Han. "Digital Engraving Digital Art Design Analysis Based on Spatial Expression Techniques". International Journal of Communication Networks and Information Security (IJCNIS) 15, nr 2 (21.09.2023): 143–58. http://dx.doi.org/10.17762/ijcnis.v15i2.6087.
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Aiming at the problems of poor transmission effect and serious data loss in digital engraving, this paper puts forward a digital modeling model from the perspective of spatial expression. First, in-depth analysis of the original digital art design can not solve the problem of digital carving accuracy, and analysis of the reasons for the poor calculation accuracy of digital carving. Using wireless network technology and WIFI technology to obtain digital information of digital engraving, through the Internet design scheme statistics, according to the digital features to judge the form and result of engraving, remove irrelevant spatial information. Then, according to the Internet data monitoring, the change rate and engraving method of the engraving data are calculated, and compared with the actual engraving requirements, the parameters and indicators of digital art design are adjusted. MATLAB simulation test analysis shows that in the case of wireless communication and Internet monitoring, the digital engraving model of spatial expression technique can improve the accuracy of artistic design, and the accuracy rate is greater than the actual design requirements. According to the design requirements of different wireless networks and network communications, the time and compliance rate of digital engraving can meet the needs of artistic design.
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Akgun, B. Tevfik. "The Digital Art of Marbled Paper". Leonardo 37, nr 1 (luty 2004): 49–52. http://dx.doi.org/10.1162/002409404772828120.
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The author describes his development of a computer-based paper-marbling tool, based on a traditional Turkish art form in which marbled-paper figures and patterns are created on the surface of a liquid bath. Similar works can be obtained by simulating fluid flows on a computer, using the Navier-Stokes equations as the physical model of the fluid flows. The author has created an application program that includes marbling tools. Such a program must run in real time, so that hand-eye coordination is required of the user. Real-time simulation of fluid flows requires much processor power. The author has attempted to adapt this technique for use with a personal computer. To decrease the processing power required, the image size may be decreased, but the results may not be as satisfactory
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López-Menchero Bendicho, Víctor Manuel, Ángel Marchante Ortega, Matthew Vincent, Ángel Javier Cárdenas Martín-Buitrago i Jorge Onrubia Pintado. "Uso combinado de la fotografía digital nocturna y de la fotogrametría en los procesos de documentación de petroglifos: el caso de Alcázar de San Juan (Ciudad Real, España)". Virtual Archaeology Review 8, nr 17 (26.07.2017): 64. http://dx.doi.org/10.4995/var.2017.6820.
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For decades, the documentation of rock art has been the backbone of the research on this cultural practice. However, traditional techniques used for this purpose have proved to be imprecise and subjective. With the advent of the digital age there has been a revolution in the field of rock art documentation in general and in particular for petroglyphs. Techniques such as digital nightlight photography or three-dimensional (3D) photogrammetry have opened a world of possibilities. In the case of nightlight photography, its use goes back to the second half of the 20th century. However, in recent years the emergence of high-power digital cameras along with new lighting systems unthinkable decades ago, such as tactical flashlights, have rejuvenated a technique that seems incombustible. After the numerous tests carried out by the DIPAR (Integral Rock Art Documentation System) project team, it has become evident that, correctly employed, this technique still has immense potential in the field of rock art documentation, especially if we take into consideration its low cost and ease of use. Photogrammetry, on the other hand, is shown as the perfect complement to the records obtained through digital nightlight photography. The possibility of applying filters or shaders that increase the visibility of the digitized petroglyphs, within a metric scheme, is a great advance in their documentation. This paper explores the advantages associated with these techniques with a case study: unpublished petroglyphs of Alcázar de San Juan (Spain).
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Kang, Min, i Mi-Ock Woo. "Production of NFT Digital Art Makeup Design Applying the Depaysement Technique". Journal of Health and Beauty 17, nr 1 (30.04.2023): 1–10. http://dx.doi.org/10.35131/ishb.2023.17.1.1.
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Akbar, Muhammad, Yunus Winoto i Rohanda Rohanda. "A Study Of Digital Record Storage Management Institutions In Art Archive Indonesian Visual Art Archive". Record and Library Journal 3, nr 2 (13.01.2018): 108. http://dx.doi.org/10.20473/rlj.v3-i2.2017.108-115.
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This study aims to determine the digital archive storage management conducted Indonesian Visual Art Archive which includes the acceptance stage archive, metadata archives, archive conversion, digital archive storage, retrieval and archive and archive evaluation stage. The location of this research done in archives art Yogyakarta Indonesian Visual Art Archive. The method used in the study used a qualitative approach with case study. As for the technique of data collection is done through observation, interview and literature study. Based on the results of this research note that the digital archive management activities undertaken archives art Yogyakarta Indonesian Visual Art Archive is a form of awareness of the importance of art as archive footage of historical development and culture. As for the digital archive management activities are some steps being taken begins with the acceptance of the archive, metadata archives, archive conversion, digital archive storage, retrieval and archive and archive evaluation stage. In this digital archive management does not have a cycle of destruction of records for each archive is a work of art performers. In addition, the digital archive storage management activities in archives art Yogyakarta Indonesian Visual Art Archive is supported by a clear procedural system.
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Pratama, Muhammad Dhimas, i Warli Haryana. "PENCIPTAAN KOMIK DENGAN GAYA PIXEL ART". Desain Komunikasi Visual Manajemen Desain dan Periklanan (Demandia) 8, nr 2 (29.09.2023): 247. http://dx.doi.org/10.25124/demandia.v8i2.4866.
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This study aims to create comics with a pixel art visual style by describing the elements and techniques used, to make pixel art style comics, especially in the form of digital comic strips, it requires knowledge of the techniques of making comics and the elements contained in pixel art itself. The method used is a descriptive qualitative approach with a creation methodology used in the making of this article, the creation method in question makes a work product the focus of research by going through three stages, namely (1) Exploration, (2) Improvisation and (3) Formation. The results showed that the technique of making comics used was to determine the story, determine the format, create characters, compose pictures and stories and determine the storyline. While the pixel art techniques or elements implemented are straight lines, dithering, jaggy style or not using anti-aliasing, and inline. Produce six panels with vertical positions measuring 260x150 pixels by paying attention to three visual elements (illustration, typography and color). This writing is expected to contribute ideas in enriching the results of studies on pixel artstyle and can popularize pixel art style as another part of art, especially as comic art.
Keywords: comic, digital, pixel art
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Seyyedi, Saeed, Kubra Cengiz, Mustafa Kamasak i Isa Yildirim. "An Object-Oriented Simulator for 3D Digital Breast Tomosynthesis Imaging System". Computational and Mathematical Methods in Medicine 2013 (2013): 1–8. http://dx.doi.org/10.1155/2013/250689.
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Digital breast tomosynthesis (DBT) is an innovative imaging modality that provides 3D reconstructed images of breast to detect the breast cancer. Projections obtained with an X-ray source moving in a limited angle interval are used to reconstruct 3D image of breast. Several reconstruction algorithms are available for DBT imaging. Filtered back projection algorithm has traditionally been used to reconstruct images from projections. Iterative reconstruction algorithms such as algebraic reconstruction technique (ART) were later developed. Recently, compressed sensing based methods have been proposed in tomosynthesis imaging problem. We have developed an object-oriented simulator for 3D digital breast tomosynthesis (DBT) imaging system using C++ programming language. The simulator is capable of implementing different iterative and compressed sensing based reconstruction methods on 3D digital tomosynthesis data sets and phantom models. A user friendly graphical user interface (GUI) helps users to select and run the desired methods on the designed phantom models or real data sets. The simulator has been tested on a phantom study that simulates breast tomosynthesis imaging problem. Results obtained with various methods including algebraic reconstruction technique (ART) and total variation regularized reconstruction techniques (ART+TV) are presented. Reconstruction results of the methods are compared both visually and quantitatively by evaluating performances of the methods using mean structural similarity (MSSIM) values.
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Younis, Mohammed Issam, Hayder Faez Abdulkareem i Hamid Mohammed Ali. "Construction of Graduation Certificate Issuing System Based on Digital Signature Technique". Journal of Engineering 21, nr 6 (1.06.2015): 15–36. http://dx.doi.org/10.31026/j.eng.2015.06.02.
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With the development of computer architecture and its technologies in recent years, applications like e-commerce, e-government, e-governance and e-finance are widely used, and they act as active research areas. In addition, in order to increase the quality and quantity of the ordinary everyday transactions, it is desired to migrate from the paper-based environment to a digital-based computerized environment. Such migration increases efficiency, saves time, eliminates paperwork, increases safety and reduces the cost in an organization. Digital signatures are playing an essential role in many electronic and automatic based systems and facilitate this migration. The digital signatures are used to provide many services and solutions that would not have been possible by the conventional hand-written signature.
In the educational environment, the process of issuing the graduation certificates can no longer be restricted to the traditional methods. Hence, a computerized system for issuing certificates of graduation in an electronic form is needed and desired. This paper proposes a Graduation Certificates Issuing System (GCIS) based on digital signature technology. In doing so, this research highlights the state-of-the-art and the art-of-the-practice for some existing digital signature-based systems in the literatures. In addition, eight intertwined elected services are identified, namely: message authentication, entity authentication, integrity, non-repudiation, time stamping, distinguished signing authorities, delegating signing capability and supporting workflow systems. Moreover, this research examines nine existing systems, showing their merits and demerits in terms of these elected services. Furthermore, the research describes the architectural design using the Unified Modeling Language (UML) and provides the concrete implementation of the proposed GCIS. The GCIS is implemented using Visual Basic.Net programming language and SQL Server database management system.
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Ilie, Emanuela, i Adina Petronela Vechiu. "THE ART-LANGUAGE TECHNIQUE. DESCRIPTION, PARTICULARITIES, FORMATIVE VALUES, APPLICATIONS". Review of Artistic Education 28 (1.04.2024): 349–60. http://dx.doi.org/10.35218/rae-2024-0040.
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Given the increasing interest of students of all ages towards digital texts, but also the prevalence of the visual over other forms of language, the use of images in the teaching of any type of content should be a priority of the didactic act – or at least a common didactic practice. Most frequently, however, teaching staff limit this priority to the use in well-defined contexts of certain visual teaching tools, be they digital/ technological or in the form of graphic and figurative materials. Without questioning their effectiveness, we promote their combination with last generation didactic techniques, which could profit from the children' s interest in the visual or hybrid spectacular (Ilie 2020: 159), in ways that stimulate, and even prioritize, the development of their aesthetic and cultural sensibility. In this article, we propose to describe one of these techniques, the art-language technique, and then to exemplify various modalities of using it, especially in the primary education. By assuming the reasoned association of a theme or a message of a literary/non-literary text with an artwork chosen from a series made available by the teachers (Ilie, 2020: 160), the art-language technique can be used in a variety of curricular, but also extra-curricular contexts, that could facilitate children's access to a wide range of contents from the school curricula specific to primary education. The applications presented in this work will take into account the areas of Language and Communication, Man and Society, Arts and Technologies, as well as Personal Development. Of course, the formative valences adjacent to the use of this technique derive from the inter- and pluri-disciplinary character it implies, giving students the opportunity to creatively express emotions and thoughts in a variety of situations. With the help of the teaching staff, the visual art works could be transformed, on one hand, into anchors that can facilitate the adequate assimilation of aesthetic and cultural contents; on the other hand, they could become excellent vehicles of supplementary meanings, resulted from the subjective experience of the student, placed in the posture of a sensible, but also critical observer, who sees beyond color and form.
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CONEN, D. "P1029 The digital stethoscope: transforming a historic art into a reproducible technique". European Heart Journal 24, nr 5 (marzec 2003): 179. http://dx.doi.org/10.1016/s0195-668x(03)94321-1.
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Purnomo, Eko, i Trianti Nugraheni. "Pengembangan Modul Tari Berbasis Digital untuk Meningkatkan Kompetensi Guru Sekolah Menengah Tari". Gondang: Jurnal Seni dan Budaya 3, nr 2 (3.12.2019): 119. http://dx.doi.org/10.24114/gondang.v3i2.14157.
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This study aimed to develop teacher modules to improve teachers' ability in managing learning materials. The study used a research and development method developed by Borg and Gall. The Subjects of the research was Teachers of Arts studies that are not backgrounded in art education. The data collection techniques used questionnaires and Focus Group Discussion. Technique of the data analysis used analisys description. Arts Subject is still guided by teachers who have no background in art education. On the other hand, the progress of information technology is still not utilized optimally. Art dance material in practice is easier to use audio visual media. Therefore, it is necessary to develop a digital-based module that can be accessed through various social media. The results showed a digital-based module developed to improve the ability of teachers in managing learning materials. Based on the research results, it can be concluded that the development of digital dance teacher module is used to improve the teachers’ competency of art and culture. Recommended, teachers are be able to develop modules in accordance with the needs in the field.
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Wu, Ciguli. "Application of Digital Image Based on Machine Learning in Media Art Design". Computational Intelligence and Neuroscience 2021 (22.11.2021): 1–14. http://dx.doi.org/10.1155/2021/8546987.
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In digital media art, expressive force is an important art form of media. This paper studies digital images that have the same effect when applied to media art. The research object is media art images, and the application effect of the proposed algorithm is related to the media art images. The development of digital image technology has brought revolutionary changes to traditional media art expression techniques. In this paper, a partial-pixel interpolation technique based on convolutional neural network is proposed. Supervised training of convolutional neural networks requires predetermining the input and target output of the network, namely, integer image and fractional image in this paper. To solve the problem that the subpixel sample cannot be obtained, this paper first analyzes the imaging principle of digital image and proposes a subpixel sample generation algorithm based on Gaussian low-pass filter and polyphase sampling. From the perspective of rate distortion optimization, the purpose of pixel motion compensation is to improve the accuracy of interframe prediction. Therefore, this paper defines pixel motion compensation as an interframe regression problem, that is, the mapping process of the reference image integral pixel sample to the current image sample to be encoded. In this paper, a generalized partial-pixel interpolation model is proposed for bidirectional prediction. The partial-pixel interpolation of bidirectional prediction is regarded as a binary regression model; that is, the integral pixel reference block in two directions is mapped to the current block to be coded. It further studies how to apply the trained digital images to media art design more flexibly and efficiently.
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VIZITIU, Andrei. "Applicability Of Actor's Art Methods In Online And Reality – Three Sisters, A.P. Chekhov". Theatrical Colloquia 14, nr 1 (1.05.2024): 86–98. http://dx.doi.org/10.35218/tco.2024.14.1.07.
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The Actor's Art techniques derived from the methods of the great pedagogues Stanislavsky, M. Chekhov, Viola Spolin were incorporated into the new pedagogical paradigm: digital theater training. The covid pandemic took the entire university environment by surprise, and the acting teachers faced a unique situation in the history of theater pedagogy. În the current situation, exams from "Three Sisters" by Chekhov were practiced, both in digital format, through Zoom platform, but also physically, in the classroom. The metaphor of the text, the metaphor of personal creative freedom existed even in these online conditions. The article presents differences and similarities in teaching the Actor's Art technique in the two situations, the adaptation of classical teaching methods to the digital situation and the evolution of students. This research took place in 2021 at Pitesti University.
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Kravcenko, Vladimir. "Some issues on the development of digital art in the Republic of Moldova". Arta 30, nr 1 (sierpień 2021): 124–29. http://dx.doi.org/10.52603/arta.2021.30-1.18.
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The paper examines the creative segment of digital art, which has been carried out by professional graphic artists in the independent Republic of Moldova, including finished artworks produced in big and small print runs, and also unique graphic works. Sketches and technical drawings of any kind are excluded from the study. Important data is provided about different images (chiesel works, book illustrations, caricatures, postage stamps, ex-librises), which were rendered digitally both in full and in part. Also, concise information is offered on the professionals practicing the respective type of digital art over the years. There is also contoured the process of nationwide spread of the digital images and the specifity of the digital creative tool. The author also examines the professional attitude towards digital art in the Republic of Moldova in terms of the relationship between mass production, traditional handmade art and digital execution technique. The reasons and conditions for the dissemination of digital images in national art are specified. The dynamics of opinions on the role of the computer in the creation and modification of graphic works at different stages of the evolution of digital and traditional technology in the Republic of Moldova is traced.
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Jász, Bálint, Máté Jász, Szandra Körmendi, Gellért Joós-Kovács, Bálint Vecsei, Péter Hermann i Judit Borbély. "Ex vivo digital comparison of four impression techniques using an industrial laser scanner". STOMATOLOGY EDU JOURNAL 9, nr 1-2 (2022): 21–26. http://dx.doi.org/10.25241/stomaeduj.2022.9(1-2).art.2.
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Introduction: The aim of the study was to compare different impression techniques used for fixed prosthodontics. Methodology: A master cast with prepared abutments was created from polymethyl-methacrylate (PMMA). A high-resolution industrial scanner was used to create a virtual reference model. Four different impressions were made, three with polyvinyl-siloxane (PVS) (n = 10 for each): one-step putty-wash (1SPW), two-step putty-wash prepared with an escape channel (2SPW-Ch), two-step putty-wash with a polyethylene spacer foil (2SPW-Fo), and one with polyether monophasic technique (MP) from the PMMA model and digitized with an industrial scanner. The stereolithographic (STL) files of the impressions (n = 40) were exported. Each file was compared to the reference using the Geomagic Verify software. Six points were assigned to enable virtual calliper measurement of tooth diameters and distances of varying sizes within the arch. Results: In the case of die diameters, the deviation from the mould ranged from 31.84 to 180.64 μm. At the stump diameter level, the MP and 1SPW techniques showed significantly more minor differences than the 2SPW-Ch, and the MP was significantly more accurate than the 2SPW-Fo. At medium distance, the deviation ranged from 42.74 to 136.47 μm. Therefore, MP was found to be significantly more accurate than 2SPW-Ch. When examining the long distance, the difference was between 162.62 and 348.85 μm. The MP and 1SPW impression techniques proved significantly more accurate than the 2SPW-Ch technique for long distances. Conclusions: With both simultaneous techniques, significantly more true results were achieved than with the two-step techniques. Keywords: Dental Impression Technique; Scanning of the Impression; Monophase; One-Step Putty-Wash; Two-Step Putty-Wash.
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Coppola, Giuseppe, i Maria Antonietta Ferrara. "Polarization-Sensitive Digital Holographic Imaging for Characterization of Microscopic Samples: Recent Advances and Perspectives". Applied Sciences 10, nr 13 (29.06.2020): 4520. http://dx.doi.org/10.3390/app10134520.
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Polarization-sensitive digital holographic imaging (PS-DHI) is a recent imaging technique based on interference among several polarized optical beams. PS-DHI allows simultaneous quantitative three-dimensional reconstruction and quantitative evaluation of polarization properties of a given sample with micrometer scale resolution. Since this technique is very fast and does not require labels/markers, it finds application in several fields, from biology to microelectronics and micro-photonics. In this paper, a comprehensive review of the state-of-the-art of PS-DHI techniques, the theoretical principles, and important applications are reported.
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Jász, Bálint, Máté Jász, Szandra Körmendi, Gellért Joós-Kovács, Bálint Vecsei, Péter Hermann i Judit Borbély. "Ex vivo digital comparison of four impression techniques using an industrial laser scanner". STOMATOLOGY EDU JOURNAL 9, nr 1 (2022): 21–26. http://dx.doi.org/10.25241/stomaeduj.2022.9(1).art.2.
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Introduction The aim of the study was to compare different impression techniques used for fixed prosthodontics. Methodology A master cast with prepared abutments was created from polymethyl-methacrylate (PMMA). A high-resolution industrial scanner was used to create a virtual reference model. Four different impressions were made, three with polyvinyl-siloxane (PVS) (n = 10 for each): one-step putty-wash (1SPW), two-step putty-wash prepared with an escape channel (2SPW-Ch), two-step putty-wash with a polyethylene spacer foil (2SPW-Fo), and one with polyether monophasic technique (MP) from the PMMA model and digitized with an industrial scanner. The stereolithographic (STL) files of the impressions (n = 40) were exported. Each file was compared to the reference using the Geomagic Verify software. Six points were assigned to enable virtual calliper measurement of tooth diameters and distances of varying sizes within the arch. Results In the case of die diameters, the deviation from the mould ranged from 31.84 to 180.64 µm. At the stump diameter level, the MP and 1SPW techniques showed significantly more minor differences than the 2SPW-Ch, and the MP was significantly more accurate than the 2SPW-Fo. At medium distance, the deviation ranged from 42.74 to 136.47 µm. Therefore, MP was found to be significantly more accurate than 2SPW-Ch. When examining the long distance, the difference was between 162.62 and 348.85 µm. The MP and 1SPW impression techniques proved significantly more accurate than the 2SPW-Ch technique for long distances. Conclusions With both simultaneous techniques, significantly more true results were achieved than with the two-step techniques.
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Elkheshen, Gamal ElDin. "Digital Revolution and Ideologies of Thought and Creativity in Graphic Arts". Journal of Art & Architecture Research Studies - JAARS 1, nr 1 (21.06.2020): 157–71. http://dx.doi.org/10.47436/jaarsfa.v1i1.27.
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What the scientific tide and digital revolution presented of methods and ideas for the structural and aesthetic construction of the workspace is what we will notice in this research by standing on one of the contemporary arts, which I borrowed from the digitization, which is the digital art that means the set of means that a person uses to reach a dramatic result using the computer Automated, The researcher has developed an equation to elicit the aesthetic concept of graphic artwork through the digital media used (digital art x digital environment) =the resulting digital product=new visual values, digitization has become as a technique in graphic arts based on digital materials, as the French philosopher "Pierre Levy" explains, and the researcher here represents "Art project”, ”Augmented reality” interactive application, shown at Venice biennale 56th, Egyptian pavilion as a practical Methods of the research in those digital experiments.
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Salinas, Cecilia G. "Anonymizing in digitalized fieldwork: An art‐based blurring approach". Anthropology Today 39, nr 6 (grudzień 2023): 15–17. http://dx.doi.org/10.1111/1467-8322.12848.
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The ongoing refinement of internet technology is compelling anthropologists to reconceptualize data acquisition within the digital realm. Conducting ethnography on sensitive topics that involve imagery necessitates the development of innovative anonymization and pseudo‐anonymization methods. This article focuses on two pivotal facets of digital space ethnography: (1) devising strategies to mitigate harm towards participant members of vulnerable communities and (2) ensuring adherence to the General Data Protection Regulation (GDPR) while preserving the privacy of incidental parties on social media platforms. This article demonstrates how artistic blurring is one anonymization technique that may be applied ethically in the digital ethnographic examination of sensitive issues in Norway.
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Zheng, Pei, i Hongyan Cong. "Visual Sensing Technology for Digital Image-Oriented Public Art Design". Security and Communication Networks 2022 (18.11.2022): 1–13. http://dx.doi.org/10.1155/2022/6480172.
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With the development of computer software technology, computer image processing software has become increasingly significant in the public art design process. It can help with graphic design inventiveness and color presentation, as well as improve the aesthetics of public art design. This study aims to analyze the use of digital image synthesis and visual sensing techniques in public art design, as well as to use Dongba paintings, which reflects Chinese culture, as image fusion research objects. The Dongba painting’s line drawing is modeled and drawn, and an element library is created. The characteristic information of Dongba paintings is extracted using line integration convolution (LIC) algorithm. The background texture elements of the image are fused using image quilting texture’s improved synthesis algorithm. To improve the image effect of the linked Dongba paintings, a local color transfer algorithm based on color transfer rights is presented. The results show that the optimized synthesis algorithm of image quilting textures can achieve the same texture synthesis effect as the original algorithm. The method can meet the needs of real-world applications while also significantly improving the original technique’s performance. The synthesis time is reduced by 87.67%, and the image recognition accuracy of the local color transfer algorithm reaches 88.9%. Compared with other algorithms, the recognition accuracy is improved by 6.4%. The proposed digital image synthesis technique can create good images with different foreground and backdrop combinations and can provide a diverse visual expression. This contributes to public art’s visual production.
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Cardinali, Marco. "Digital Tools and Technical Views: The Intersection of Digital Art History and Technical Art History in a Digital Archive on the Painting Technique of Caravaggio and His Followers". Visual Resources 35, nr 1-2 (11.02.2019): 52–73. http://dx.doi.org/10.1080/01973762.2019.1555351.
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Saha, Basudev, Bidyut Das i Mukta Majumder. "A deep-reinforcement learning approach for optimizing homogeneous droplet routing in digital microfluidic biochips". Nanotechnology and Precision Engineering 6, nr 2 (1.06.2023): 023001. http://dx.doi.org/10.1063/10.0017350.
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Over the past two decades, digital microfluidic biochips have been in much demand for safety-critical and biomedical applications and increasingly important in point-of-care analysis, drug discovery, and immunoassays, among other areas. However, for complex bioassays, finding routes for the transportation of droplets in an electrowetting-on-dielectric digital biochip while maintaining their discreteness is a challenging task. In this study, we propose a deep reinforcement learning-based droplet routing technique for digital microfluidic biochips. The technique is implemented on a distributed architecture to optimize the possible paths for predefined source–target pairs of droplets. The actors of the technique calculate the possible routes of the source–target pairs and store the experience in a replay buffer, and the learner fetches the experiences and updates the routing paths. The proposed algorithm was applied to benchmark suites I and III as two different test benches, and it achieved significant improvements over state-of-the-art techniques.
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Voruganti, Santhosh. "Digital Image Watermarking using Chaotic Encryption and Arnold Transform". International Journal for Research in Applied Science and Engineering Technology 9, nr VI (20.06.2021): 1825–35. http://dx.doi.org/10.22214/ijraset.2021.35417.
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Internet has caused an extraordinary increase in the transfer and sharing of digital data like text, videos, images, audio, etc. over it. However, with the advent of modern access technology, multimedia data is more prone to security risks as data can be modified or redistributed without prior permission. Chaotic encryption-based blind digital image watermarking technique applicable to both grayscale and colour images. Discrete cosine transform (DCT) is used before embedding the watermark in the host image. Arnold transform is used in addition to chaotic encryption to add double-layer security to the watermark. Three different variants of the proposed algorithm have been tested and analysed. The simulation results show that the proposed scheme is robust to most of the image processing operations like joint picture expert group compression, sharpening, cropping, and median filtering. To validate the efficiency of the proposed technique, the simulation results are compared with certain state-of-art techniques.
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Nagornaya, L. N. "AESTHETICS OF GLITCH ART: ORIGINS AND MEANINGS". Arts education and science 1, nr 4 (2021): 159–66. http://dx.doi.org/10.36871/hon.202104020.
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The relevance of the article is associated with the rapid development of various forms of digital art, due to the increasing role of information technologies, which have caused fundamental transformation processes in the modern cultural environment. The article is devoted to the origin and value-semantic foundations of such a direction of modern digital art as glitch art. The origins of this direction, which lies in the aesthetics of Futurism, experiments in concrete music, as well as in the technique of deconstruction and recombination of parts of the original image in Cubism, are considered. Examples of glitch art are given — "Tali Hinkus" by Paul Hertz, "Glitch Diva" by Elena Romenkova, "White" (from the "Utopia" series) by Viktor Makurin, parallels with cinema works ("The Matrix" directed by Wachowski) are drawn. An important property of digital art is its ability to fill the global information space with new meanings and values: it is both a protest against total technocracy and digitalization, and a fixed gap in collective techno-hypnosis, and a display of the processes of the human subconscious. The study of this phenomenon allows to take a critical look at the interaction of the physical and digital world within modern culture, to identify the prospects for this interaction.
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Kacunko, Slavko. "Roads to Recursion. Some historiographical remarks on a core category of Media Art". Revista ICONO14 Revista científica de Comunicación y Tecnologías emergentes 12, nr 2 (1.07.2014): 70–85. http://dx.doi.org/10.7195/ri14.v12i2.682.
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In this paper, the general arena between analogue and digital media art is explored with special respect to the concept of the ‘newness’ of media. The first part confirms the Closed Circuit as an ‘open system’ related to its right to an evolution towards increasing complexity without the reciprocal playing-off of self-referential ‘life’ against ‘hetero-referential’ technique. The second part refers to the continuity of research undertaken in media, art and art-history and discussion in related fields while the concepts of ‘new’ media have repeatedly admitted the Closed Circuit as a core category in ‘New’ Media Art. The third part introduces one content-related categorization of Closed Circuit video installations which has been regarded as representative for the general ‘fields of inquiry’ of both analogue and digital media art.
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Lyu, Jieyin, Fuli Zhou i Yandong He. "Digital Technique-Enabled Container Logistics Supply Chain Sustainability Achievement". Sustainability 15, nr 22 (16.11.2023): 16014. http://dx.doi.org/10.3390/su152216014.
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With the rapid development of digital technology, the smart sensor-based container equipment and intelligent logistics operations contribute to achieving the efficiency improvement and sustainability achievement of container supply chain under the IoT-based logistics 4.0 scenarios. This paper tries to study the state-of-the-art knowledge of the container logistics supply chain management motivated by digital techniques. Through data-driven analysis this review is performed to assist researchers and practitioners to better understand the container logistics management. The integrated research framework is designed by developing a bibliometric analysis study to address the research themes of the container logistics era. The related publications from the Web of Science database from 2003 to 2022 were indexed and 2897 reference samples are collected as the research data. In addition, the VosViewer is adopted to portray the network, co-occurrence, and co-word analysis by visualizing the collaborative relationships of collected samples. The results show that digital technology has been widely applied in container logistics supply chain management practices, contributing to resilience and sustainability improvement by intelligent operations. These research findings are also helpful for researchers by providing a deep penetrating insight into research opportunities and great potentials of container logistics supply chain by innovative digital technology-enabled practices.
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Sahu, Aditya Kumar, Gandharba Swain i E. Suresh Babu. "Digital Image Steganography Using Bit Flipping". Cybernetics and Information Technologies 18, nr 1 (1.03.2018): 69–80. http://dx.doi.org/10.2478/cait-2018-0006.
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Abstract This article proposes bit flipping method to conceal secret data in the original image. Here a block consists of 2 pixels and thereby flipping one or two LSBs of the pixels to hide secret information in it. It exists in two variants. Variant-1 and Variant-2 both use 7th and 8th bit of a pixel to conceal the secret data. Variant-1 hides 3 bits per a pair of pixels and the Variant-2 hides 4 bits per a pair of pixels. Our proposed method notably raises the capacity as well as bits per pixel that can be hidden in the image compared to existing bit flipping method. The image steganographic parameters such as, Peak Signal to Noise Ratio (PSNR), hiding capacity, and the Quality Index (Q.I) of the proposed techniques has been compared with the results of the existing bit flipping technique and some of the state of art article.
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Xie, Hua. "Improving Students' Drawing Skills with Digital Tools: A Case Study from Zhengzhou, China". International Journal of Humanities and Arts Computing 18, nr 1 (marzec 2024): 148–66. http://dx.doi.org/10.3366/ijhac.2024.0326.
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Computer art has recently become a vital part of the artistic process of creating digital versions of illustrations. Digital painting is an example. It has become a new phenomenon in Chinese art, transforming technique, aesthetics and culture. Thus, this study determines the impact of digital tools on the digital painting skills of students with different painting levels. The study involved 90 students from the Zhengzhou Preschool Education College in China. The study used a quasi-experimental design with a single-group pre-test/post-test design. The research findings indicated that there were improvements in painting skills for the groups with poor and medium achievements. The considered painting skills included composition, colour theory, interpretation and creativity. The resulting data validate the positive impact of digital tools on learning and creating paintings. The research described in this article is valuable for creating and implementing innovative courses in digital painting. Future studies should focus on the design and development of computer-aided painting courses and their impact on art students.
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Kessler, A., R. Hickel i M. Reymus. "3D Printing in Dentistry—State of the Art". Operative Dentistry 45, nr 1 (1.01.2020): 30–40. http://dx.doi.org/10.2341/18-229-l.
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SUMMARY Three-dimensional (3D) printing is a rapidly developing technology that has gained widespread acceptance in dentistry. Compared to conventional (lost-wax technique) and subtractive computer numeric controlled methods, 3D printing offers process engineering advantages. Materials such as plastics, metals, and ceramics can be manufactured using various techniques. 3D printing was introduced over three decades ago. Today, it is experiencing rapid development due to the expiration of many patents and is often described as the key technology of the next industrial revolution. The transition to its clinical application in dentistry is highly dependent on the available materials, which must not only provide the required accuracy but also the necessary biological and physical properties. The aim of this work is to provide an up-to-date overview of the different printing techniques: stereolithography, digital light processing, photopolymer jetting, material jetting, binder jetting, selective laser sintering, selective laser melting, and fused filament fabrication. Additionally, particular attention is paid to the materials used in dentistry and their clinical application.
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Negi, Ashish, i Saurabh Sharma. "The Optimized Classification of Mammograms Based on the Antlion Technique". International Journal of Grid and High Performance Computing 12, nr 2 (kwiecień 2020): 64–86. http://dx.doi.org/10.4018/ijghpc.2020040104.
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Breast cancer is one of the main health issues for women. This disease can be cured only if detected at early stages. Digital mammography is used to detect the malignant cells at an early stage. This article designs a methodology to detect the malignant tumors. The methodology is comprised of preprocessing feature extraction by Gabor and Law's feature extraction, and feature reduction by ant-lion optimization as well as a classification step using a SVM classifier which is implemented on the live dataset prepared through the Rajindra Hospital Patiala along with MIAS and DDSM datasets. The results of proposed techniques have been compared with three states of art techniques SVM based classification without feature reduction, PSOWNN i.e. PSO based reduction with a neural network as a classifier and binary gray wolf-based feature reduction with SVM classifier. The performance analysis proves the significance of the technique.
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Gosul, Manohar, i Nisarg Gandhewar. "A Reversible Digital Image Watermarking Technique for Integrity and Authenticity of MR Images". International Journal of Engineering Research in Computer Science and Engineering 9, nr 9 (21.09.2022): 41–46. http://dx.doi.org/10.36647/ijercse/09.09.art012.
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Digital Watermarking is the art and science of embedding information in existing digital content for Digital Rights Management (DRM) and authentication. Reversible watermarking is a class of (fragile) digital watermarking that not only authenticates multimedia data content, but also helps to maintain perfect integrity of the original multimedia “cover data”. Watermarking of digital images is a well-known technique that is widely used for securing image contents. A successful watermarking method must be accurate, reversible, resilient, and robust against various attacks. The technical revolution associated with the implementation the development of digital technologies in medicine, has led to the emergence and active development of new directions in many areas of medicine. The authenticity and integrity of medical images has to be protected. Hence in this paper a reversible digital image watermarking technique for integrity and authenticity of MR (Magnetic Resonance) images is presented. Reversible watermarking is recognized as a robust approach to confirm the integrity and authenticity of medical images and to verify that alterations can be detected and tracked back.
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Maior, João Souto, Byron Leite Dantas Bezerra, Luciano Leal, Celso Antonio M. Lopes Júnior i Cleber Zanchettin. "A Comparative Study of Forecasting Methods in the Context of Digital Twins". Revista de Engenharia e Pesquisa Aplicada 9, nr 1 (28.12.2023): 28–40. http://dx.doi.org/10.25286/repa.v9i1.2771.
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This paper describes and compares different forecasting techniques usedto build a real-world Industry 4.0 application using concepts of DigitalTwins. For this experiment, real data collected from a temperature sensorduring the initial stages of a manufacturing process is used. This raw datafrom the sensors is preprocessed using state-of-the-art time seriestechniques for gap removal, normalization, and interpolation. Theprocessed data are then used as input for the selected forecastingtechniques for training, forecasting, and tests. Finally, the rates of thedifferent techniques are compared using accuracy measures to determinethe most accurate technique to be used in the application to support itsforecasting use cases. This paper also explores different areas that canbe used as topics for future work.
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Pillai, Sangeeth, Akshaya Upadhyay, Parisa Khayambashi, Imran Farooq, Hisham Sabri, Maryam Tarar, Kyungjun T. Lee i in. "Dental 3D-Printing: Transferring Art from the Laboratories to the Clinics". Polymers 13, nr 1 (4.01.2021): 157. http://dx.doi.org/10.3390/polym13010157.
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The rise of three-dimensional (3D) printing technology has changed the face of dentistry over the past decade. 3D printing is a versatile technique that allows the fabrication of fully automated, tailor-made treatment plans, thereby delivering personalized dental devices and aids to the patients. It is highly efficient, reproducible, and provides fast and accurate results in an affordable manner. With persistent efforts among dentists for refining their practice, dental clinics are now acclimatizing from conventional treatment methods to a fully digital workflow to treat their patients. Apart from its clinical success, 3D printing techniques are now employed in developing haptic simulators, precise models for dental education, including patient awareness. In this narrative review, we discuss the evolution and current trends in 3D printing applications among various areas of dentistry. We aim to focus on the process of the digital workflow used in the clinical diagnosis of different dental conditions and how they are transferred from laboratories to clinics. A brief outlook on the most recent manufacturing methods of 3D printed objects and their current and future implications are also discussed.
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Sharma, Akankasha, Amit Kumar Singh i Pardeep Kumar. "Combining Haar Wavelet and Karhunen-Loeve Transform for Robust and Imperceptible Data Hiding Using Digital Images". Journal of Intelligent Systems 27, nr 1 (26.01.2018): 91–103. http://dx.doi.org/10.1515/jisys-2017-0032.
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Abstract In this paper, we present an introduction of digital image watermarking followed by important characteristics and potential applications of digital watermarks. Further, recent state-of-the-art watermarking techniques as reported by noted authors are discussed in brief. It includes the performance comparison of reported transform/spatial domain based watermarking techniques presented in tabular form. This comprehensive survey will be significant for researchers who will be able to implement more efficient watermarking techniques. Moreover, we present a robust watermarking technique using fusion of discrete wavelet transform (DWT) and Karhunen-Loeve transform for digital images. Further, visual quality of the watermarked image is enhanced by using different image de-noising techniques. The results are obtained by varying the gain factor, size of the image watermark, different DWT sub-bands, and image processing attacks. Experimental results demonstrate that the method is imperceptible and robust for different image processing attacks.
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Miftahul Amri, Muhammad, Mahamadaree Waeno i Muhammad Zain Musa. "LSB Steganography to Embed Creator's Watermark in Batik Digital Arts". Engineering Science Letter 2, nr 01 (11.03.2023): 27–32. http://dx.doi.org/10.56741/esl.v2i01.301.
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This paper presents an implementation of Least Significant Bit (LSB) steganography to embed a hidden watermark in batik digital images. The goal of the technique is to provide a means of protecting the intellectual property of creators of batik digital arts while still allowing the images to be freely distributed and shared. The study demonstrates the effectiveness of the technique by showing that the embedded watermark is not visible to the human eye and does not significantly alter the quality of the image. The proposed technique uses the LSB method to embed a watermark in the binary data of the batik digital image. This method involves replacing the least significant bit of the image's pixel values with the bits of the watermark, thus altering the binary data of the image without causing noticeable changes in its visual appearance. The embedded watermark can only be detected by a decoding process, making it difficult to be removed or tampered with. The results of the study show that the implemented LSB steganography technique is successful in achieving its objective. The technique is able to effectively embed a hidden watermark in batik digital images without significantly altering the image quality or causing visual artifacts. This work highlights the potential of LSB steganography as a valuable tool for protecting the intellectual property of digital art creators, particularly in the field of batik images. Overall, this study contributes to the growing body of research on steganography and digital media protection. The successful implementation of the LSB steganography technique provides a promising approach for safeguarding the intellectual property of creators in the digital arts industry. Future research may explore other steganography techniques to address potential vulnerabilities and limitations of the LSB method.
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Pérez-Salvatierra Saavedra, Begoña, i Elisa María Díaz González. "Estudios digitales fotográficos del Álbum Pintoresco de Canarias de Domingo Bello y Espinosa". Vegueta. Anuario de la Facultad de Geografía e Historia 22, nr 1 (7.02.2022): 157–75. http://dx.doi.org/10.51349/veg.2022.1.09.
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El avance de las nuevas tecnologías digitales ha desencadenado la evolución de una gran variedad de técnicas utilizadas en el análisis de obras de arte y otros objetos de la cultura material humana. El presente artículo recoge el estudio digital de la técnica pictórica utilizada por el estudioso canario Domingo Bello y Espinosa (1817-1884) en su cuaderno Álbum Pintoresco de Canarias (1879). A partir del uso de la fotografía digital, se desarrolló un primer acercamiento a la caracterización de la técnica de este autor en la realización de sus ilustraciones científicas. Se invita a reflexionar sobre el desconocimiento de ilustraciones del canario y de la utilidad de la tecnología digital en su interpretación. Advances in new digital technologies have led to the blossoming of a great variety of techniques for analysing art objects, as well as other elements of material culture. This article outlines a digital study of the artistic technique employed by Canarian naturalist Domingo Bello y Espinosa (1817-1884) in his notebook Álbum Pintoresco de Canarias (1879, whereby digital photography has offered an initial approach to his technique of scientific illustration. The article brings to light this Canarian’s heretofore little-known scientific drawings while inviting reflection on the usefulness of digital technology in interpreting them.
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Singh, Juhi, i Arun Kumar. "Enhancing digital information concealment through DWT-based coefficient alteration and steganographic technique". Journal of Discrete Mathematical Sciences and Cryptography 27, nr 2 (2024): 283–92. http://dx.doi.org/10.47974/jdmsc-1882.
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Concealing information within digital images, blending the realms of art and science, has gained heightened significance in contemporary society. As a substantial amount of personal data is readily available on the world wide web in various formats, including text, still-images, and videos, safeguarding this information becomes imperative. This study explores data hiding through the alteration of coefficients using a DWT. Employing the Data Hiding in the Frequency Domain proves to be more advantageous compared to methods in the other domain. The scaling factor emerges as a pivotal parameter, exerting a substantial influence on key performance metrics. The suggested approach enhances the confidentiality, invisibility, and robustness of concealed data by integrating it within the Discrete Wavelet Transform (DWT) coefficients.
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Skoog, B., P. Helmholz i D. Belton. "MULTISPECTRAL ANALYSIS OF INDIGENOUS ROCK ART USING TERRESTRIAL LASER SCANNING". ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLI-B5 (15.06.2016): 405–12. http://dx.doi.org/10.5194/isprs-archives-xli-b5-405-2016.
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Multispectral analysis is a widely used technique in the photogrammetric and remote sensing industry. The use of Terrestrial Laser Scanning (TLS) in combination with imagery is becoming increasingly common, with its applications spreading to a wider range of fields. Both systems benefit from being a non-contact technique that can be used to accurately capture data regarding the target surface. Although multispectral analysis is actively performed within the spatial sciences field, its extent of application within an archaeological context has been limited. This study effectively aims to apply the multispectral techniques commonly used, to a remote Indigenous site that contains an extensive gallery of aging rock art. The ultimate goal for this research is the development of a systematic procedure that could be applied to numerous similar sites for the purpose of heritage preservation and research. The study consisted of extensive data capture of the rock art gallery using two different TLS systems and a digital SLR camera. The data was combined into a common 2D reference frame that allowed for standard image processing to be applied. An unsupervised k-means classifier was applied to the multiband images to detect the different types of rock art present. The result was unsatisfactory as the subsequent classification accuracy was relatively low. The procedure and technique does however show potential and further testing with different classification algorithms could possibly improve the result significantly.
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Skoog, B., P. Helmholz i D. Belton. "MULTISPECTRAL ANALYSIS OF INDIGENOUS ROCK ART USING TERRESTRIAL LASER SCANNING". ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLI-B5 (15.06.2016): 405–12. http://dx.doi.org/10.5194/isprsarchives-xli-b5-405-2016.
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Multispectral analysis is a widely used technique in the photogrammetric and remote sensing industry. The use of Terrestrial Laser Scanning (TLS) in combination with imagery is becoming increasingly common, with its applications spreading to a wider range of fields. Both systems benefit from being a non-contact technique that can be used to accurately capture data regarding the target surface. Although multispectral analysis is actively performed within the spatial sciences field, its extent of application within an archaeological context has been limited. This study effectively aims to apply the multispectral techniques commonly used, to a remote Indigenous site that contains an extensive gallery of aging rock art. The ultimate goal for this research is the development of a systematic procedure that could be applied to numerous similar sites for the purpose of heritage preservation and research. The study consisted of extensive data capture of the rock art gallery using two different TLS systems and a digital SLR camera. The data was combined into a common 2D reference frame that allowed for standard image processing to be applied. An unsupervised k-means classifier was applied to the multiband images to detect the different types of rock art present. The result was unsatisfactory as the subsequent classification accuracy was relatively low. The procedure and technique does however show potential and further testing with different classification algorithms could possibly improve the result significantly.
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Sharma, Satender, Usha Chauhan, Ruqaiya Khanam i Krishna Kant Singh. "Digital Watermarking using Grasshopper Optimization Algorithm". Open Computer Science 11, nr 1 (1.01.2021): 330–36. http://dx.doi.org/10.1515/comp-2019-0023.
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Abstract The advancement in computer science technology has led to some serious concerns about the piracy and copyright of digital content. Digital watermarking technique is widely used for copyright protection and other similar applications. In this paper, a technique for digital watermarking based on Discrete Cosine Transform (DCT), Discrete Wavelet Transform (DWT), and Grasshopper Optimization Algorithm (GOA) is proposed. The method computes the DWT of the cover image to obtain the sub-components of the image. The subcomponent is converted to frequency domain using DCT. The challenge is to find the optimal scaling factor to be used for watermarking. The authors have designed a GOA based technique that finds the optimized scaling factor and the coefficient for embedding the watermark. GOA makes the watermark undetectable and is invisible in the cover image. The watermark image is embedded in the cover image using these coefficients. The extraction of watermark from the cover image is done by using inverse DCT and DWT. The proposed method is compared with the other state of the art methods. The effectiveness of the proposed method is computed using Peak Signal to Noise Ratio (PSNR), Normalized Cross Correlation (NCC) and Image Fidelity (IF). The proposed method outperforms the other methods and can be effectively used for practical digital watermarking.
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Murroni, Maurizio, Cristian Perra i Daniele D. Giusto. "Slow Motion and Zoom in HD Digital Videos Using Fractals". International Journal of Digital Multimedia Broadcasting 2009 (2009): 1–12. http://dx.doi.org/10.1155/2009/496934.
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Slow motion replay and spatial zooming are special effects used in digital video rendering. At present, most techniques to perform digital spatial zoom and slow motion are based on interpolation for both enlarging the size of the original pictures and generating additional intermediate frames. Mainly, interpolation is done either by linear or cubic spline functions or by motion estimation/compensation which both can be applied pixel by pixel, or by partitioning frames into blocks. Purpose of this paper is to present an alternative technique combining fractals theory and wavelet decomposition to achieve spatial zoom and slow motion replay of HD digital color video sequences. Fast scene change detection, active scene detection, wavelet subband analysis, and color fractal coding based on Earth Mover's Distance (EMD) measure are used to reduce computational load and to improve visual quality. Experiments show that the proposed scheme achieves better results in terms of overall visual quality compared to the state-of-the-art techniques.
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Widyahety, Indah, Sunardi Sunardi i Joko Yuwono. "Analysis of Media Needs for Dance Learning for Deaf Students Based on Interactive Multimedia". Proceeding of International Conference on Special Education in South East Asia Region 1, nr 1 (25.05.2024): 146–53. http://dx.doi.org/10.57142/picsar.v1i1.39.
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This study aims to analyze the essential needs in the development of digital media for learning the art of dance for deaf students in special schools. This research design uses a descriptive study approach. The population of this research is all dance teachers who teach deaf students at Special Schools (SLB) Central Java. The sampling technique used was the incidental sampling technique. The data collection technique used a questionnaire sent in google form format through WhatsApp media. Data analysis used a descriptive technique by measuring each item with percentage criteria. The results of the study show that the expected digital media is interactive multimedia, with a duration of 15 to 20 minutes. The media can be stored and operated on all digital media. The content of the dance that is expected is a traditional dance. The media is equipped with a complete user manual.
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Nezami, Zahid Iqbal, Hamid Ali, Muhammad Asif, Hanan Aljuaid, Isma Hamid i Zulfiqar Ali. "An efficient and secure technique for image steganography using a hash function". PeerJ Computer Science 8 (24.11.2022): e1157. http://dx.doi.org/10.7717/peerj-cs.1157.
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Steganography is a technique in which a person hides information in digital media. The message sent by this technique is so secret that other people cannot even imagine the information’s existence. This article entails developing a mechanism for communicating one-on-one with individuals by concealing information from the rest of the group. Based on their availability, digital images are the most suited components for use as transmitters when compared to other objects available on the internet. The proposed technique encrypts a message within an image. There are several steganographic techniques for hiding hidden information in photographs, some of which are more difficult than others, and each has its strengths and weaknesses. The encryption mechanism employed may have different requirements depending on the application. For example, certain applications may require complete invisibility of the key information, while others may require the concealment of a larger secret message. In this research, we proposed a technique that converts plain text to ciphertext and encodes it in a picture using up to the four least significant bit (LSB) based on a hash function. The LSBs of the image pixel values are used to substitute pieces of text. Human eyes cannot predict the variation between the initial Image and the resulting image since only the LSBs are modified. The proposed technique is compared with state-of-the-art techniques. The results reveal that the proposed technique outperforms the existing techniques concerning security and efficiency with adequate MSE and PSNR.