Dissertations / Theses on the topic 'Skin features'
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Al-Qarni, Garsah Farhan. "Skin texture features for face recognition." Thesis, University of Kent, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.633831.
Full textSun, Shih-Yu. "Ultrasound probe localization by tracking skin features." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/93069.
Full textCataloged from PDF version of thesis.
Includes bibliographical references (pages 131-141).
Ultrasound probe localization with respect to the human body is essential for freehand three-dimensional ultrasound (3D US), image-guided surgery, and longitudinal studies. Existing methods for probe localization, however, typically involve bulky and expensive equipment, and suffer from patient motion artifacts. This thesis presents a highly cost-effective and miniature-mobile system for ultrasound probe localization in six degrees of freedom that is robust to rigid patient motion. In this system, along with each acquisition of an ultrasound image, skin features in the scan region are recorded by a lightweight camera rigidly mounted to the probe. Through visual simultaneous localization and mapping (visual SLAM), a skin map is built based on skin features and the probe poses are estimated. Each pose estimate is refined in a Bayesian probabilistic framework that incorporates visual SLAM, ultrasound images, and a prior motion model. Extraction of human skin features and their distinctiveness in the context of probe relocalization were extensively evaluated. The system performance for free-hand 3D US was validated on three body parts: lower leg, abdomen, and neck. The motion errors were quantified, and the volume reconstructions were validated through comparison with ultrasound images. The reconstructed tissue structures were shown to be consistent with observations in ultrasound imaging, which suggests the system's potential in improving clinical workflows. In conjunction with this localization system, an intuitive interface was developed to provide real-time visual guidance for ultrasound probe realignment, which allows repeatable image acquisition in localized therapies and longitudinal studies. Through in-vivo experiments, it was shown that this system significantly improves spatial consistency of tissue structures in repeated ultrasound scans.
by Shih-Yu Sun.
Ph. D.
Denda, Mitsuhiro. "Physicochemical features of human skin stratum corneum." Kyoto University, 1994. http://hdl.handle.net/2433/160747.
Full textKyoto University (京都大学)
0048
新制・論文博士
博士(工学)
乙第8661号
論工博第2902号
新制||工||970(附属図書館)
UT51-94-R420
(主査)教授 中西 浩一郎, 教授 森島 績, 教授 砂本 順三
学位規則第4条第2項該当
Isaieva, O. A., and О. Г. Аврунін. "Video dermoscopy study of the skin." Thesis, Liverpool, United Kingdom, 2019. http://openarchive.nure.ua/handle/document/10265.
Full textKundu, Benjamin Ina Annesha. "Imaging platforms for detecting and analyzing skin features and Its stability : with applications in skin health and in using the skin as a body-relative position-encoding system." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/100114.
Full textCataloged from PDF version of thesis.
Includes bibliographical references (pages 121-124).
Skin imaging is a powerful, noninvasive method used with potential to aid in the diagnosis of various dermatological diseases and assess overall skin health. This thesis discusses imaging platforms that were developed to aid in studying skin features and characteristics at different time and length scales to characterize and monitor skin. Two applications are considered: (1) using natural skin features as a position encoding system and an aid for volume reconstruction of ultrasound imaging and (2) studying natural skin feature evolution or stability over time to aid in assessing skin health. A 5-axis, rigid translational scanning system was developed to capture images at specific locations and to validate skin based body registration algorithms. We show that natural skin features could be used to perform ultrasound based reconstruction accurate to 0.06 mm. A portable, handheld scanning device was designed to study skin characteristics at different time and length scales. With this imaging platform, we analyze skin features at different length scales: [mu]m (for microreliefs), mm (for moles and pores), and cm (for distances between microreliefs and other features). Preliminary algorithms are used to automatically identify microreliefs. Further work in image processing is required to assess skin variation using these images.
by Ina Annesha Kundu.
S.M.
Tarnavska, S. I., and E. V. Vlasova. "Features of skin atopic reactivity in children, suffering from bronchial asthma depending on inflammatory blood hatterns." Thesis, Матеріали науково-практичної конференції [“Актуальні питання діагностики та лікування алергічних і неалергічних захворювань респіраторної системи у дітей» і сателітного симпозіуму «Сучасні технології та інновації викладання педіатрії та пульмонології»], 2017. http://dspace.bsmu.edu.ua:8080/xmlui/handle/123456789/13027.
Full textGriffiths, Mat. "A thesis on the clinical behhaviour, histological features, long term persistence and cytokine profile of a living skin substitute in an acute, deep-dermal, human wound model." Thesis, Queen Mary, University of London, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.542035.
Full textDent, Randl B. "The Role of Afrocentric Features in Mental Healthcare Utilization and Counselor Preferences in Black College Students." VCU Scholars Compass, 2017. https://scholarscompass.vcu.edu/etd/5112.
Full textОлешко, Олександр Миколайович, Александр Николаевич Олешко, and Oleksandr Mykolaiovych Oleshko. "Анатомо-експериментальне обгрунтування використання хітозанових мембран для пластики механічних дефектів шкіри у віковому аспекті." Thesis, Сумський державний університет, 2017. http://essuir.sumdu.edu.ua/handle/123456789/51786.
Full textДиссертация посвящена изучению особенностей строения участка кожи в процессе регенерации механического дефекта в возрастном аспекте при использовании хитозановых мембран. С помощью современных методов исследования впервые изучены особенности репаративной регенерации кожи в условиях ее механической травмы на основе фаз раневого процесса в возрастном аспекте. Впервые была выявлена достоверная разница между традиционными подходами и применением хитозановых мембран с целью лечения механических ран кожи. Экспериментальные покрытия получили более выраженный терапевтический эффект. Выявлено, что хитозан усиливает макрофагальную реакцию, что свидетельствует об активации функции фагоцитоза, что в свою очередь, приводит к уменьшению микробной контаминации механической раны. Уменьшение площади поверхности дефекта при применении хитозана достоверно выше, чем без использования лекарственных средств. Впервые установлено, что при заживлении ран кожи под влиянием хитозана происходит быстрое формирование грануляционной ткани с хорошо развитым микроциркуляторным руслом, большим количеством и полиморфизмом клеток и волокнистых структур.
Dissertation is devoted to the study of the structural features of skin in the process of regeneration of a mechanical defect in the age aspect after application of chitosan membranes. Features of reparative regeneration of the skin mechanical trauma was studied using modern methods of research based on the phases of wound healing in the age aspect. We found significant difference between traditional approaches and the use of chitosan membranes for the treatment of mechanical skin wound. Experimental wound dressings have shown pronounced therapeutic effect. It revealed that chitosan enhances macrophage response, which indicates by activation of phagocytosis, which in turn, reduces microbial contamination of trauma surface. Reducing the surface area of the defect in the application of chitosan was significantly higher than without the treatment. It was found that the healing of skin wounds under the influence of chitosan leads rapid formation of granulation tissue with well-developed vessels, and a large number of polymorphic cells and fibrous structures. The use of chitosan membranes leads to a significant increase in the area of granulation tissue at the 3rd day of observation in animals of all ages (maximum rate in young animals – 13.21 ± 0.46% (p = 0.0023)). The amount of granulation tissue decreased from the 7th day, indicating the formation of connective tissue regenerate. Total area of the defect was significantly lower compared to the control only in young animals – 0.35 ± 0.05 cm2 (p = 0.0183). Cell compound of the wounds characterized by decreasing in the number of neutrophils and lymphocytes in all periods of observation and the percentage of macrophages and fibroblasts from the 3rd and 7th days, respectively. Maximum number of endothelial cells increased on the 7th day and is depending on the age of – from 3.1 ± 0.16% (p = 0.1075) (old age) to 7.2 ± 0.44% (p = 0.0246) (young animals). Morphometric study in case of chitosan application indicate normalization of vascular reactions, accompanied by a decrease in the relative area of stromal edema in animals and young age from the 3rd day, and in old rats – in 7th day of observation. The relative area of the dermis and blood vessels diameter is reduced only to animals of young age – 6.90 ± 0.47% (p = 0.5481) and 17.77 ± 1.25 mm (p = 0.2051), respectively . These histological studies suggest an earlier beginning of the formation of granulation tissue, especially in young animals (from the 3rd day of observation) and optimization of the formation of connective tissue and epithelialization of the wound surface to the 21st day. Application of chitosan membranes leads to reduction of wound surface colonization by opportunistic pathogens in the early stages of reparative processes in animals and young and adult ages. Up to the 21st day of observation on the wound surface observed the presence of staphylococci and streptococci only in an amount from ≤ 40 to ≤ 102 CFU / ml.
Mushfieldt, Diego. "Robust facial expression recognition in the presence of rotation and partial occlusion." Thesis, University of Western Cape, 2014. http://hdl.handle.net/11394/3367.
Full textThis research proposes an approach to recognizing facial expressions in the presence of rotations and partial occlusions of the face. The research is in the context of automatic machine translation of South African Sign Language (SASL) to English. The proposed method is able to accurately recognize frontal facial images at an average accuracy of 75%. It also achieves a high recognition accuracy of 70% for faces rotated to 60◦. It was also shown that the method is able to continue to recognize facial expressions even in the presence of full occlusions of the eyes, mouth and left/right sides of the face. The accuracy was as high as 70% for occlusion of some areas. An additional finding was that both the left and the right sides of the face are required for recognition. As an addition, the foundation was laid for a fully automatic facial expression recognition system that can accurately segment frontal or rotated faces in a video sequence.
Krhut, Miloš. "Rozpoznávání obličejů v obraze." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2009. http://www.nusl.cz/ntk/nusl-217997.
Full textBrown, Dane. "Faster upper body pose recognition and estimation using compute unified device architecture." Thesis, University of Western Cape, 2013. http://hdl.handle.net/11394/3455.
Full textThe SASL project is in the process of developing a machine translation system that can translate fully-fledged phrases between SASL and English in real-time. To-date, several systems have been developed by the project focusing on facial expression, hand shape, hand motion, hand orientation and hand location recognition and estimation. Achmed developed a highly accurate upper body pose recognition and estimation system. The system is capable of recognizing and estimating the location of the arms from a twodimensional video captured from a monocular view at an accuracy of 88%. The system operates at well below real-time speeds. This research aims to investigate the use of optimizations and parallel processing techniques using the CUDA framework on Achmed’s algorithm to achieve real-time upper body pose recognition and estimation. A detailed analysis of Achmed’s algorithm identified potential improvements to the algorithm. Are- implementation of Achmed’s algorithm on the CUDA framework, coupled with these improvements culminated in an enhanced upper body pose recognition and estimation system that operates in real-time with an increased accuracy.
Levesque, Vincent 1977. "Measurement of skin deformation using fingerprint feature tracking." Thesis, McGill University, 2002. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=79246.
Full textBednář, Luboš. "Využití gest v uživatelských rozhraních." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2012. http://www.nusl.cz/ntk/nusl-236599.
Full textSamuelsson, Emil. "Classification of skin pixels in images : Using feature recognition and threshold segmentation." Thesis, Umeå universitet, Institutionen för datavetenskap, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-155400.
Full textMunnangi, Anirudh. "Innovative Segmentation Strategies for Melanoma Skin Cancer Detection." University of Cincinnati / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1510916097483278.
Full textKripakaran, Rolance. "Face Detection and Facial Feature Localization for multi-pose faces and complex backgroundimages." Thesis, Högskolan Dalarna, Datateknik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:du-5705.
Full textKolman, Aleš. "Detekce obličejů ve videu." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2012. http://www.nusl.cz/ntk/nusl-236583.
Full textKhan, Muhammad. "Hand Gesture Detection & Recognition System." Thesis, Högskolan Dalarna, Datateknik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:du-6496.
Full textEnoksson, Malin. "Barnplagg i alla storlekar." Thesis, Högskolan i Borås, Institutionen Textilhögskolan, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-16860.
Full textProgram: Designteknikerutbildningen
Motiečiūtė, Lina. "Odos ir minkštųjų audinių standumo charakteristikų skaičiavimas baigtinių elementų metodu." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2006. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2006~D_20060619_104533-39125.
Full textEner, Emrah. "Recognition Of Human Face Expressions." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/3/12607521/index.pdf.
Full textSteinholtz, Tim. "Skip connection in a MLP network for Parkinson’s classification." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-303130.
Full textI denna avhandling har två olika arkitektur designer för ett artificiellt flerskikts neuralt nätverk implementerats. En arkitektur som följer konventionen för ett vanlig MLP nätverk, samt en ny arkitektur som introducerar DenseNet inspirerade genvägs kopplingar i MLP nätverk. Modellerna användes och utvärderades för klassificering, vars mål var att urskilja försökspersoner som friska eller diagnostiserade med Parkinsons sjukdom baserat på röst attribut. Modellerna tränades på ett öppet tillgänglig dataset för Parkinsons klassificering och utvärderades på en delmängd av denna data som inte hade använts för träningen, samt två dataset som kommer från en annan ljudinspelnings miljö än datan för träningen. Avhandlingen sökte efter svaret på två frågor; Hur okänsliga modeller för Parkinsons klassificering är för ljudinspelnings miljön och hur de föreslagna genvägs kopplingarna i en MLP-modell kan bidra till att förbättra prestanda och generalisering kapacitet. Resultaten av avhandlingen visar att ljudmiljön påverkar noggrannheten, men drar slutsatsen att med mer tid skulle man troligen kunna övervinna detta och möjliggöra god noggrannhet i nya ljudmiljöer. När det kommer till om genvägs kopplingarna förbättrar noggrannhet och generalisering, är avhandlingen inte i stånd att dra några breda slutsatser på grund av den data som användes. Modellerna hade generellt bästa prestanda med grunda nätverk, och det är i djupare nätverk som genvägs kopplingarna argumenteras för att förbättra dessa egenskaper. Med det sagt, om man bara kollade på resultaten på datan som är ifrån en annan ljudinspelnings miljö så hade genvägs arkitekturen bättre resultat i två av de tre testerna som utfördes.
Kück, Karen Melody. "Periglacial features in the vicinity of Tiffindell Ski Resort, North East Cape Drakensberg, South Africa, and their implications for the development of the resort." Thesis, Rhodes University, 1997. http://hdl.handle.net/10962/d1005520.
Full textAbdallah, Abdallah Sabry. "Investigation of New Techniques for Face detection." Thesis, Virginia Tech, 2007. http://hdl.handle.net/10919/33191.
Full textMaster of Science
Bellamy, Stephen, and steve bellamy@flinders edu au. "RESOURCE PARTITIONING BETWEEN TWO SYMPATRIC AUSTRALIAN SKINKS, EGERNIA MULTISCUTATA AND EGERNIA WHITII STEPHEN BELLAMY Thesis submitted in total fulfilment of the requirements of the degree of Doctor of Philosophy AUGUST 2006 SCHOOL OF BIOLOGICAL SCIENCES FLINDERS UNIVERSITY, ADELAIDE, SOUTH AUSTRALIA ________________________________________." Flinders University. Biological Sciences, 2007. http://catalogue.flinders.edu.au./local/adt/public/adt-SFU20070124.145924.
Full textSoares, Heliana Bezerra. "An?lise e classifica??o de imagens de les?es da pele por atributos de cor, forma e textura utilizando m?quina de vetor de suporte." Universidade Federal do Rio Grande do Norte, 2008. http://repositorio.ufrn.br:8080/jspui/handle/123456789/15118.
Full textConselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico
The skin cancer is the most common of all cancers and the increase of its incidence must, in part, caused by the behavior of the people in relation to the exposition to the sun. In Brazil, the non-melanoma skin cancer is the most incident in the majority of the regions. The dermatoscopy and videodermatoscopy are the main types of examinations for the diagnosis of dermatological illnesses of the skin. The field that involves the use of computational tools to help or follow medical diagnosis in dermatological injuries is seen as very recent. Some methods had been proposed for automatic classification of pathology of the skin using images. The present work has the objective to present a new intelligent methodology for analysis and classification of skin cancer images, based on the techniques of digital processing of images for extraction of color characteristics, forms and texture, using Wavelet Packet Transform (WPT) and learning techniques called Support Vector Machine (SVM). The Wavelet Packet Transform is applied for extraction of texture characteristics in the images. The WPT consists of a set of base functions that represents the image in different bands of frequency, each one with distinct resolutions corresponding to each scale. Moreover, the characteristics of color of the injury are also computed that are dependants of a visual context, influenced for the existing colors in its surround, and the attributes of form through the Fourier describers. The Support Vector Machine is used for the classification task, which is based on the minimization principles of the structural risk, coming from the statistical learning theory. The SVM has the objective to construct optimum hyperplanes that represent the separation between classes. The generated hyperplane is determined by a subset of the classes, called support vectors. For the used database in this work, the results had revealed a good performance getting a global rightness of 92,73% for melanoma, and 86% for non-melanoma and benign injuries. The extracted describers and the SVM classifier became a method capable to recognize and to classify the analyzed skin injuries
O c?ncer de pele ? o mais comum de todos os c?nceres e o aumento da sua incid?ncia deve-se, em parte, ao comportamento das pessoas em rela??o ? exposi??o ao sol. No Brasil, o c?ncer de pele n?o melanoma ? o mais incidente na maioria das regi?es. A dermatoscopia e ideodermatoscopia s?o os principais tipos de exames para o diagn?stico de doen?as da pele dermatol?gicas. O campo que envolve o uso de ferramentas computacionais para o aux?lio ou acompanhamento do diagn?stico m?dico em les?es dermatol?gicas ainda ? visto como muito recente. V?rios m?todos foram propostos para classifica??o autom?tica de patologias da pele utilizando imagens. O presente trabalho tem como objetivo apresentar uma nova metodologia inteligente para an?lise e classifica??o de imagens de c?ncer de pele, baseada nas t?cnicas de processamento digital de imagens para extra??o de caracter?sticas de cor, forma e textura, utilizando a Transformada Wavelet Packet (TWP) e a t?cnicas de aprendizado de m?quina denominada M?quina de Vetor de Suporte (SVM Support Vector Machine). A Transformada Wavelet Packet ? aplicada para extra??o de caracter?sticas de textura nas imagens. Esta consiste de um conjunto de fun??es base que representa a imagem em diferentes bandas de freq??ncia, cada uma com resolu??es distintas correspondente a cada escala. Al?m disso, s?o calculadas tamb?m as caracter?sticas de cor da les?o que s?o dependentes de um contexto visual, influenciada pelas cores existentes em sua volta, e os atributos de forma atrav?s dos descritores de Fourier. Para a tarefa de classifica??o ? utilizado a M?quina de Vetor de Suporte, que baseia-se nos princ?pios da minimiza??o do risco estrutural, proveniente da teoria do aprendizado estat?stico. A SVM tem como objetivo construir hiperplanos ?timos que apresentem a maior margem de separa??o entre classes. O hiperplano gerado ? determinado por um subconjunto dos pontos das classes, chamado vetores de suporte. Para o banco de dados utilizado neste trabalho, os resultados apresentaram um bom desempenho obtendo um acerto global de 92,73% para melanoma, e 86% para les?es n?o-melanoma e benigna. O potencial dos descritores extra?dos aliados ao classificador SVM tornou o m?todo capaz de reconhecer e classificar as les?es analisadas
Yang, Sheng-wen, and 楊勝文. "Face Detection Using Skin Color and Facial Features." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/42669186798181792813.
Full text逢甲大學
通訊工程所
100
There are many researches and related applications for face detection such as smiling camera, electric cosmetic mirror, alteration of facial features and so on. All of them base on face detection and facial features to achieve required results. We are interested in using a simple algorithm, and we can get the same face detection result. This thesis can apply to generally personal images. It can only detect the location of glasses in the wearing glasses or sunglasses situation. The first, we transform RGB image into YCbCr image, and we estimate the threshold for skin color to reduce environmental effect in different images. Moreover, we execute skin color detection. The second, mouth (it uses a mouth map algorithm) and eyes (it uses non-skin color, black-white image and eyes mask scan) can be detected in the skin color blocks. Finally, we use simple geometry and optimal face ratio to prove facial features. Detecting the location of glasses uses skin color blocks and sub-skin color blocks to merge by means of conditions. The results can get accurate locations on mouth, eyes and glasses.
Chen, Huan-Jhang, and 陳奐彰. "The Face’s Features Localization Technology by Combining Skin-Color Segmentation with Color Enhancement of Features." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/31800242277815348584.
Full text龍華科技大學
電子系碩士班
94
In the consideration of the security of electronic transactions, the demands of more humanistic human-machine interfaces, and the trends of multimedia communications applications, the recognition technologies that use unique personal biological features are more and more important. The face recognition technology is one of them. The judging conditions to recognize human faces are based on facial features such as eyes, mouth, eyebrows, and nose. We have to locate facial features before identifying human faces. Therefore, feature localization is essential in the process of recognizing human faces. And the accuracy of feature localization has a decisive influence on recognition results. This thesis mainly proposes a face’s features localization technology that combines skin-color segmentation with color enhancement of features. For skin-color segmentation, a reliable skin color model that is adaptable to people of different skin colors and to different lighting conditions is adopted to segment human skin regions from non-skin regions. Some image processing processes are performed to filter out the noises of image and unlikely skin regions, and only the most probable skin regions are kept and needed to do the searching of face’s features. During feature finding process, a feature color enhancement method is exploited to enhance the features of eyes and mouth. Then, an elliptic template is applied in the calculation of locating the actual regions of eyes. Finally, the actual positions of features and face can be found based on the inherent positional relationship between eyes and mouth.
魏銘輝. "Combination of Skin Color and Appearance Features for Face Detection." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/97252300079909995272.
Full text中華大學
資訊工程學系(所)
96
In this paper, both appearance-based features and skin color features are used for face detection. The Intel’s Open Source Computer Vision (OpenCV) object detection module which uses appearance-based features is first employed to detection candidate face images. Since some non-face images may be detected as face images by the OpenCV object detection module, skin color features are then employed to reject a lot of non-face images. Two skin color feature sets are extracted in the CbCr space, including skin pixel ratio and skin color distance, for classification purpose. Experimental results on the test images in the Utechzone Machine Vision Prize face detection contest have shown that all face and non-face regions can be correctly identified.
Huang, Hsin-Hui, and 黃欣慧. "Research on the Features of Human Skin Appearance by Image Processing." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/17085078384070319806.
Full text元智大學
資訊管理學系
94
Skin test has been used popularly as a sort of trend recently, by which it evaluates the participant’s skin with a non-invasive way and provides information in terms of his or her condition or age of skin. Skin test instrument, however, can only record a specific range depending how far region of skin the probe can reach. Also, an operator has to be trained well before using it. Hence, skin test instrument does not have competence of providing entire information of the participant’s skin condition. Using image processing techniques to analyze characteristics of skin and make a recording of them is not only simplifying the process of skin test, but also providing a way to widen the ability of evaluating the quality of skin. In the research, we use image processing techniques to gain distinctiveness of skin texture, and record them by a digital-imagery way. This provides the details of skin information. First at all, we set up a standard environment for photographing in order to gain the participant’s skin image as clear as possible. Then, by the region of interest (ROI) which has been drawn manually the operation will be made with the color space feature, the spot feature, the wrinkle feature, and skin texture feature to offer the features of the participant’s skin image. After this, using the Pearson statistic apprises how relevant the image feature is with the skin test instrument data, the non-expert data, and the expert data. Conclusively, we will have the image features which are highly fit for skin evaluation.
Vaz, Mafalda Sofia Mendes Beirão Neto. "Impact of formulation and process variables, in technological features of dosage forms for skin delivery." Master's thesis, 2016. http://hdl.handle.net/10316/40674.
Full textA camada mais externa da pele funciona como barreira para muitos compostos o que significa que, apesar das formas farmacêuticas semi-sólidas terem ganho destaque, devido às vantagens que apresentam face às formulações orais, apenas alguns produtos transdérmicos ou tópicos, como o Ozonol, têm sido desenvolvidos para tratar condições de artrite aguda e/ou crónica, inflamações, ou estados febris, usando fármacos anti-inflamatórios que promovem uma acção curta e um tratamento rápido. O objetivo desta dissertação consiste em desenvolver um filme com base num gel, para a administração de ibuprofeno, de forma a constituir uma alternativa aos produtos já existentes no mercado. Para isso, foram preparados hidrogéis sob agitação magnética a 25, 60 e 80ºC. Os filmes foram obtidos por laminação e secagem dos hidrogéis a 37ºC. A análise das propriedades mecânicas e adesivas foram realizadas através do Texturómetro (TA.TX Plus) e os estudos de libertação e permeação in vitro, foram efectuados através das células de Franz. Os hidrogéis contendo 1,5% de Hidroxipropilmetilcelulose (HPMC) e diferentes rácios de propilenoglicol e PEG 400 foram avaliados primeiramente, com base nas suas propriedades mecânicas, demonstrando que a melhor formulação foi preparada com 20% de PEG 400, a 80ºC. Após a escolha de melhor formulação base, foram feitos testes experimentais de forma a averiguar como é que o peso molecular do PEG influenciava o desempenho da formulação. Dado aos baixos valores de libertação obtidos pelos hidrogéis, foi feita uma mudança a nível tecnológico da forma farmacêutica, para filmes. Os filmes eram, globalmente, finos e transparentes e quando testados em ensaios de permeação, evidenciaram que o PEG 200 era o melhor promotor de permeação. Para optimizar as propriedades adesivas, foi feita uma selecção de adesivos com base na literatura e testes experimentais, sendo escolhidos o quitosano, na proporção de 1:5 (HPMC: Quitosano) e também o Eudragit L30 D-55 num rácio de 1:1. Os resultados finais demonstram que o adesivo é crucial, para aumentar a libertação de ibuprofeno da formulação, sendo que o Eudragit obteve valores acima do esperado, obtendo resultados ainda melhores do que a referência comercial. servir de base para um produto promissor, que combine a adesão ao tratamento por parte dos doentes e a capacidade e eficácia de atender a necessidades médicas, ainda não respondidas.
The outermost skin layer is an effective barrier to many compounds, that means, although semisolid dosage forms have gained interest due to their advantages in comparison to the oral formulations, only a few topical/transdermal products, as Ozonol, have been developed, specifically to treat medical conditions e.g acute and chronic arthritis, inflammation and fever, using non-steroidal anti-inflammatory drugs (NSAIDs) to provide a rapid treatment with short duration of action. The aim of the present work was to develop a hydrogel based film for skin delivery of ibuprofen, an NSAID, as an alternative formulation to the few products already on the market. The Hydrogel formulations were prepared under mechanical stirring at 25, 60 and 80ºC. Films were obtained from lamination of the hydrogels, followed by drying in an oven at 37ºC. In order to perform the mechanical and adhesive properties analysis a TA.TP Plus Texture Analyser was used. Furthermore, Franz cells were used to assess the in vitro release and permeation studies. Hydrogels based on hydroxypropylmethylcellulose (HPMC), in a concentration of 1.5% containing different ratios of propylene glycol and PEG 400, were firstly evaluated based on their mechanical properties. The results obtained, showed that the best base composition was prepared at 80ºC and contained 20% of PEG 400, which was then assessed, so as to understand the effect of the molecular weight of PEG on the formulation performance. Due to a low release extent obtained from the hydrogels, a change to film dosage forms was made. Films presented, in general, a thin, smooth and transparent aspect and the permeation studies indicated PEG 200 as the best permeation enhancer. To improve the adhesive properties of the film an adhesive screening, was further performed, resulting in the choice of chitosan in a ratio of 1:5 (HPMC: chitosan) and Eudragit L30 D-55 in 1:1 proportion with HPMC. The final results showed that the presence of adhesive is crucial to promote the ibuprofen release from the films, showing that the formulation with Eudragit led to better results than the commercial reference, Ozonol. These main findings may provide a basis for the development of a future promising product, combining an improved treatment compliance and efficacy with the ability to fit an unmet medical need.
Lu, Lin, and 盧霖. "Developing Skin-color Mapping Algorithm Based Feature Points of Facial Images." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/37725489836579230411.
Full text國立臺灣科技大學
光電工程研究所
103
When users select cosmetics, they may spend much time in the process of trying the products. If we can provide a series of template images, they can select the cosmetic effects on their face to do a simulation result using digital facial makeup technology. The procedure can save the time of trying cosmetic and reduce the damage caused by makeup and cleaning up process to help the user choose the proper cosmetics. This study presents a comprehensive digital makeup process to achieve this goal. It can simulate a similar cosmetic effect on a user’s facial image from the original image with sample makeup images. At the beginning, we captured the feature points on the contour of face. The selecting part of the face with makeup was morphed into the other one who was without makeup. In the processing of color transformation, the 8-bit RGB signals was converted to the CIELAB color space, which includes the lightness channel and the color channels. With edge preserving smooth method, the detailed lightness layer was processed from subtracting lightness channel with smoothed image. And the smoothed image can be regarded as the blurred lightness layer. Finally, through a series of image fusion processing, and converting the CIELAB signals back to 8-bit RGB signals, digital facial makeup was completed. Ensured the digital makeup process, the paper adjusted the parameters related with lightness and chroma to generate 3 simulated images whose cosmetic effect were between original image and sample makeup image. Then, the image of a part of cheek, which was selected by the feature points of face, was picked up to calculate the average CIELAB values and the color difference between the original image and simulated images. The simulated image is as near to sample makeup image in both lightness and chroma as the parameter become larger. It proved that the result achieved the purpose of cosmetic simulation truly.
Li, Chia-Hao, and 李佳豪. "Face detection using Gradient feature and skin-colorinformation under insufficient light condition." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/46039391091478672309.
Full text朝陽科技大學
資訊管理系碩士班
98
In recent years, face recognition and tracking have been employed in many applications and research areas such as security identification, etc. Face detection is an important preprocessing task of them. In this paper, we propose a method based on the feature of skin color and other important information for detecting the correct position of human face under the situation of insufficient light source. In our method, images are first classified by the feature of skin color and then finely repaired for further analysis. Next we roughly detect the candidate position of the eyes and lip. After excluding the improper triangular relation of them, it is mapped into a regular triangle using affine transformation. And then we search the nose position using the pattern of vertical and horizontal gradient. At last the face area is determined by the eyes, nose and lip positions. The experiments show that our method is able to detect the position of human face effectively. Moreover, our method can overcome the problem that the colors of complex background are similar to the skin caused by the insufficient light source. Thus our method is then effective and efficient for face detection.
Lé, Ricardo Pereira Cunha de Sousa. "Automatic analysis of skin lesions in dermoscopy images: feature extraction and classification." Dissertação, 2015. https://repositorio-aberto.up.pt/handle/10216/80395.
Full textLé, Ricardo Pereira Cunha de Sousa. "Automatic analysis of skin lesions in dermoscopy images: feature extraction and classification." Master's thesis, 2015. https://repositorio-aberto.up.pt/handle/10216/80395.
Full textHuang, Chih-Wei, and 黃志偉. "Exploring the Effect on Video Skim with Feature Film." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/82642753871891975508.
Full text長榮大學
資訊管理研究所
97
Video skim combined total skimmed length(TSL) with skimmed segment(SS) based on a subjective quality assessment method is examined in this paper. In our experiment, the total skimmed length includes three levels, 5%, 10%, and 15%, while the skimmed segment includes three levels, 2.5, 5, and 10 seconds for a separated unit. We observe that the video skim with the longer TSL and SS has the better representativeness to original movie content, but the four combinations for 10% and 15% with 5 sec and 10 sec are insignificantly different. The finding is helpful for reducing the time cost of skimming video. Further, we apply two important factors, personality focus of the medium and multiple cues, from the media richness theory to our skimming method in order to raise the representativeness of video skim for a feature movie. In the personality focus of the medium, we identity three parts for a feature movie and discuss three different combinations to focus on each part averagely, many ending part, and most ending part. We find that skimming the most end part and including multiple cues such as text, audio, and video could raise the representativeness of film skim.
Lin, Jau-You, and 林昭佑. "A Study of Face Replacement Based on Facial Feature Location and Skin Color Consistence." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/39351018123058923077.
Full text國立交通大學
電機與控制工程系所
93
Face replacement system plays an important role in the entertainment industries. Recently, however, most of these are assisted by hand and specific tools. Therefore, there are not many papers in this field. In this thesis, we describe a new face replacement system for automatically replacing a face with image processing. In the system, we segment the facial region by skin color analysis and morphology. Feature detection and connectivity analysis are applied to find candidates of facial feature. Then we combine mouth color analysis to obtaining features of the mouth. The eyes are located by geometric relation with mouth and projection function. We obtain features of the chin by information of gradient and entropy. Then we use the least square method to construct the chin line. We can wrap and locate the target face by feature matching. We extract skin color pixels on face region. We make the skin color of the original face similar to that of the original face by histogram matching. Image blending and smoothing is used to eliminate the seam. As can be seen, the experimental results show that this face replacement system has good performance if both original and target faces are front-facing as long as there are no large variations in illumination and skin tones.
Lin, Hung-San, and 林煌山. "Detection of Facial Occlusions by Skin-Color based and Local-Minimum based Feature Extractor." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/49855590801014045878.
Full text國立中央大學
資訊工程研究所
91
The frequently-encountered problems in human face detection and recognition are complex background and occlusion of human face features. In this thesis, we adopt dynamic information of video sequences to resolve the complex background problem. The speed of face detection can be drastically decreased due to the reduced in the size of searching window. In addition to the extraction of face features, we can also determine whether face features are occluded. Two strategies are proposed in this thesis to achieve the goal. The first strategy is to use skin color information by analyzing the skin color distribution in YCbCr color system. Non-skin color regions can be eliminated by utilizing the analyzed skin color distribution information. Then, face features are paired based on the geometric constraints. If the pairing is failure, the face skin color distribution ratios obtained from statistical results are utilized to determine if occlusion do occur. If the first strategy fails in determining whether human faces are occluded, then the second strategy is employed. The second strategy is implemented based on the facts that the gray values of eyes and mouths are lower than the other parts in human faces and there will contain more edge information in the vicinity of eyes and mouths. The candidates of eyes and mouths can be extracted according to the aforementioned two facts. Then, all possible candidates are paired. If the pairing is failure, the determination of occlusion/non-occlusion can be accomplished by judging the distribution of these candidates. Experiments were conducted on various video images. Experimental results verify the feasibility and validity of our proposed approach in determining the occlusion/non-occlusion of face features.
Peng, Jiun-He, and 彭俊和. "A Study on Human Skin Feature Extraction Using Image Processing Techniques and Fuzzy Logic System." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/90297399051932766645.
Full text元智大學
資訊管理學系
96
While the cosmetic industry is getting more attention as the global cosmetic industry is growing at 7% pace, Taiwan’s Executive Yuan had listed cosmetic industry in the Industrial Value Heightening Plan in 2003. Skin test instrument is an important tool for cosmetic industry which not only providing an overview of skin condition, but also a useful tool for recommending cosmetic products suitable for customers. However, skin test instrument may cause insalutary problem due to its contact with the skin. In addition, most skin test instrument cannot record the exact location of skin being tested By recording facial skin with digital image and using image processing techniques to analyze characteristics of skin, it does not only overcome the insalutary problem which may cause in the skin test procedure, but also record the location of facial skin being tested. We set up a standardized photographing environment for facial skin image acquirement and then calculate the skin roughness index, the freckles index, and the pimples index. These indices are used as the input to the fuzzy logic system. Based on the fuzzy rules and the defuzzification process - the last step of the proposed fuzzy logic system, we can derive a final evaluation of skin condition. The proposed system provides a way of evaluating skin condition with an aspect close to the general public.
陳佳玲. "An explanatory study of skip logic and time record features influencing data quality in web surveys." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/06899837571052516409.
Full text中華大學
資訊管理學系
92
As the number of Internet users has grown, Web surveys were used for data collection have replaced traditional methods. However, as Web surveys have become increasingly popular and adopt, the researchers are beginning to discuss related important issues including design features, advantages, shortcomings, and limitations of Web surveys. In this study, we used the experimental method to verify the Web surveys design features like Skip Logic, Time Record (EWS), and the locations of respondent’s profile qustions influencing the data quality and response rates. Using the 3*2 factorial design to collect data and verified the relationships between the design features. In the experimental process, EWS compares the data quality and response rates with paper questionnaire and traditional Web survey. Based on the experimental results, several findings can be proposed. Skip Logic feature was taken in the design of Web survey can incresases response rate, but it was not significantly to increase the data reliability and to reduce the time taken to complete the questionnaire. Time Record feature can increases the data reliability. And the locations of respondent’s profile questions affect data reliability. Skip Logic feature can positively effect on response rates. Time Record feature that respondent’s fill the answers in questionnaire can provide reasearchers to decide the outliers in order to improve the data reliability. The respondent’s profile questions arranged in front of the questionnaire has a positive effect on data reliability. Skip Logic feature was taken in the design of Web survey can’t increase data reliabiliy and response rate. It also can’t reduce the time that was taken to complete the questionnair. The results of this study will provide some suggestions for the reasearchers in the future. Researchers can investigate the other constructs. Althought Web Surveys have becoming popular and adopt, the traditional methods can’t be abandon. Reasearchers in the survey process should select a suitable method based on the personality property, sample frame, and the research topic.