Дисертації з теми "Skin features"
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1
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.
Повний текст джерелаАнотація:
Face recognition has been deployed in a wide range of important applications including surveillance and forensic identification. However, it still seems to be a challenging problem as its performance severely degrades under illumination, pose and expression variations, as well as with occlusions, and aging. In this thesis, we have investigated the use of local facial skin data as a source of biometric information to improve human recognition. Skin texture features have been exploited in three major tasks, which include (i) improving the performance of conventional face recognition systems, (ii) building an adaptive skin-based face recognition system, and (iii) dealing with circumstances when a full view of the face may not be avai'lable. Additionally, a fully automated scheme is presented for localizing eyes and mouth and segmenting four facial regions: forehead, right cheek, left cheek and chin. These four regions are divided into nonoverlapping patches with equal size. A novel skin/non-skin classifier is proposed for detecting patches containing only skin texture and therefore detecting the pure-skin regions. Experiments using the XM2VTS database indicate that the forehead region has the most significant biometric information. The use of forehead texture features improves the rank-l identification of Eigenfaces system from 77.63% to 84.07%. The rank-l identification is equal 93.56% when this region is fused with Kernel Direct Discriminant Analysis algorithm.
2
Sun, Shih-Yu. "Ultrasound probe localization by tracking skin features." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/93069.
Повний текст джерелаАнотація:
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2014.Cataloged 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.
3
Denda, Mitsuhiro. "Physicochemical features of human skin stratum corneum." Kyoto University, 1994. http://hdl.handle.net/2433/160747.
Повний текст джерелаАнотація:
本文データは平成22年度国立国会図書館の学位論文(博士)のデジタル化実施により作成された画像ファイルを基にpdf変換したものであるKyoto 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
4
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.
Повний текст джерелаАнотація:
The work is devoted to the study of the main pathologies of the skin, the possibility of diagnosing them using video dermatoscopy. Determining the differences between digital dermoscopy and video dermoscopy. The difference between the diagnosis of common skin diseases from malignant and tumors is considered. The science of fluorescent technology is being studied. The diagnostic capabilities of digital dermatoscopy are discussed.
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Kundu, 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.
Повний текст джерелаАнотація:
Thesis: S.M., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2015.Cataloged 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.
6
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.
Повний текст джерела
7
Griffiths, 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.
Повний текст джерела
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Dent, 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.
Повний текст джерелаАнотація:
Though mental health issues are prevalent in Black young adults, they underutilize mental healthcare services. This research examined the role of feature-based discrimination in mental healthcare (under)utilization. Study 1, a secondary analysis of the National Longitudinal Study of Adolescent to Adult Health, provided no evidence supporting a link between skin tone and mental healthcare utilization, when controlling for depression diagnosis. However, when controlling for depression symptoms, there was a trend such that Black young adults with darker, as opposed to lighter, skin tone utilized healthcare less. Study 2, an experimental study with 33 Black college students, showed 73% of the sample preferred a Black counselor. Additionally, they preferred counselors with darker skin, wider nose, and thicker lips, compared to counselors with lighter skin, narrower nose, and thinner lips. These findings suggest the importance of taking into account Afrocentric features and its social consequences when assessing health-related behaviors in Black Americans.
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Олешко, Олександр Миколайович, Александр Николаевич Олешко та 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.
Повний текст джерелаАнотація:
Дисертація присвячена вивченню особливостей будови ділянки шкіри в процесі регенерації механічного дефекту у віковому аспекті при використанні хітозанових мембран. За допомогою сучасних методів дослідження було вперше вивчено особливості репаративної регенерації шкіри за умов її механічної травми на основі фаз ранового процесу у віковому аспекті. Вперше було виявлено достовірну різницю між традиційними підходами та застосуванням хітозанових мембран із метою лікування механічних ран шкіри. Експериментальні покриття одержали більш виражений терапевтичний ефект. Виявлено, що хітозан підсилює макрофагальну реакцію, що свідчить про активацію функції фагоцитозу, що у свою чергу, приводить до зменшення мікробної контамінації механічної рани. Зменшення площі поверхні дефекту при застосуванні хітозану достовірно вище, ніж без використання лікарських засобів. Уперше встановлено, що при загоєнні ран шкіри під впливом хітозану відбувається швидке формування грануляційної тканини з добре розвиненим мікроциркуляторним руслом, великою кількістю і поліморфізмом клітин і волокнистих структур.Диссертация 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.
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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.
Повний текст джерелаАнотація:
>Magister Scientiae - MScThis 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.
11
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.
Повний текст джерелаАнотація:
The master thesis deals with the topic of detecting faces in digital images. There are generally described and classified the most frequently used methods and discussed their advantages and disadvantages. More detailed is described skin color detection, eye and mouth detection and are teoretically described machine learning algorithms and detection based on Haar-classifiers. The work aims to implementation of these methods in the OpenCV library, it refers to practical application of them a finally compares different provided trained files.
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Brown, 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.
Повний текст джерелаАнотація:
>Magister Scientiae - MScThe 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.
13
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.
Повний текст джерелаАнотація:
This thesis describes an experimental platform for the study of skin stretch of the human fingerpad during tactile exploration tasks. A digital camera records the sequence of patterns created by a fingertip as it slides over a transparent surface with simple geometrical features. Skin deformation is measured with high temporal and spatial resolution by tracking anatomical landmarks on the fingertip. Techniques adapted from the field of online fingerprinting are used to acquire high-contrast fingerprint images and extract salient features (pores, valley endings, and valley bifurcations). The performance of the method is evaluated with surfaces embossed with a ridge or valley and flat surfaces. This work is motivated by the need to provide meaningful 'tactile movies' for a tactile display using distributed lateral skin stretch.
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Bednář, 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.
Повний текст джерелаАнотація:
This master thesis deals with the use of gestures in user interfaces. The goal of this thesis is to create library for hand tracking and gesture recognition in real time. For hand tracking was choosen algorithm Flock of Features. Classification of gestures is done by using algorithm DTW. This thesis also contains stage design, design and implementation of a system that uses this library. Within the tests was tested control of various application using this library.
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Samuelsson, 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.
Повний текст джерелаАнотація:
The purpose of this report is to investigate and answer the research question: How can current skin segmentation thresholding methods be improved in terms of precision, accuracy, and efficiency by using feature recognition, pre- and post-processing? In this work, a novel algorithm is presented for classification of skin pixels in images. Different pre-processing methods were evaluated to improve the overall performance of the algorithm. Mainly, the methods of image smoothing, and histogram equalization were tested. Using a Gaussian kernel and contrast limited adaptive histogram equalization (CLAHE) was found to give the best result. A face recognition technique based on learned face features were used to identify a skin color range for each image. Threshold segmentation was then used, based on the obtained skin color range, to extract a skin map for each image. The skin maps were improved by testing a morphology method called closing and by using contour detection for an elimination of large false skin structures within skin regions. The skin maps were then evaluated by calculating the precision, recall, accuracy, and f-measure using a ground truth dataset called Pratheepan. This novel approach was compared to previous work in the field and obtained a considerable higher result. Thus, the algorithm is an improvement compared to previous work within the field.
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Munnangi, Anirudh. "Innovative Segmentation Strategies for Melanoma Skin Cancer Detection." University of Cincinnati / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1510916097483278.
Повний текст джерела
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Kripakaran, 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.
Повний текст джерелаАнотація:
The objective of this thesis work, is to propose an algorithm to detect the faces in a digital image with complex background. A lot of work has already been done in the area of face detection, but drawback of some face detection algorithms is the lack of ability to detect faces with closed eyes and open mouth. Thus facial features form an important basis for detection. The current thesis work focuses on detection of faces based on facial objects. The procedure is composed of three different phases: segmentation phase, filtering phase and localization phase. In segmentation phase, the algorithm utilizes color segmentation to isolate human skin color based on its chrominance properties. In filtering phase, Minkowski addition based object removal (Morphological operations) has been used to remove the non-skin regions. In the last phase, Image Processing and Computer Vision methods have been used to find the existence of facial components in the skin regions.This method is effective on detecting a face region with closed eyes, open mouth and a half profile face. The experiment’s results demonstrated that the detection accuracy is around 85.4% and the detection speed is faster when compared to neural network method and other techniques.
18
Kolman, Aleš. "Detekce obličejů ve videu." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2012. http://www.nusl.cz/ntk/nusl-236583.
Повний текст джерелаАнотація:
The project is focused on face detection in video. Firstly, it contains a summary of basic color models. Secondly, you can find the description and comparison of the basic methods for detection of human skin with a practical example of implementation of parametric detector. Thirdly, a theoretical basis for face detection and face tracking in a video containing a list of basic concepts and methods of this issue follows. Greater emphasis is placed on the description of machine learning algorithm AdaBoost and description of the possible application of the Kalman filter for the purpose of face tracking. Design, implementation and testing of library accomplished within the master thesis are listed in the final part of this thesis.
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Khan, Muhammad. "Hand Gesture Detection & Recognition System." Thesis, Högskolan Dalarna, Datateknik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:du-6496.
Повний текст джерелаАнотація:
The project introduces an application using computer vision for Hand gesture recognition. A camera records a live video stream, from which a snapshot is taken with the help of interface. The system is trained for each type of count hand gestures (one, two, three, four, and five) at least once. After that a test gesture is given to it and the system tries to recognize it.A research was carried out on a number of algorithms that could best differentiate a hand gesture. It was found that the diagonal sum algorithm gave the highest accuracy rate. In the preprocessing phase, a self-developed algorithm removes the background of each training gesture. After that the image is converted into a binary image and the sums of all diagonal elements of the picture are taken. This sum helps us in differentiating and classifying different hand gestures.Previous systems have used data gloves or markers for input in the system. I have no such constraints for using the system. The user can give hand gestures in view of the camera naturally. A completely robust hand gesture recognition system is still under heavy research and development; the implemented system serves as an extendible foundation for future work.
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Enoksson, Malin. "Barnplagg i alla storlekar." Thesis, Högskolan i Borås, Institutionen Textilhögskolan, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-16860.
Повний текст джерелаАнотація:
I studien tas måttlistor fram för tre barnplagg med funktionsdetaljer. Plaggen graderas för att kontrollera att skillnadsintervallerna är rimliga att skicka vidare till produktion. Studien genomförs mot ett företag som uppgiften utformas tillsammans med och som bidrar med material i form av tyg, provplagg att utgå ifrån, samt handledning.Metoden för studien är huvudsakligen experimentell forskning i form av avmätning, konstruktion, gradering och sömnad. Underlag för den experimentella forskningen består av litteratur. Huvudfokus ligger på gradering då plaggen i studien omfattar ett stort storleksspann innehållande 12 storlekar vilka är 86-152 centilong. Utöver detta kommer funktionsdetaljer samt passform att behandlas i studien. I rapporten undersöks om det är rimligt att arbeta i ett stort storleksspann där rekommenderad indelning av barnstorlekar frångås. Utöver detta undersöks även om samma kragkonstruktion kan användas till två olika jackor samt hur raglanärm bör graderas utan att minska rörelsen i ärmen.Genom att först mäta av och utvärdera de plagg som företaget tillhandahåller uppnås resultat. Därefter konstrueras och sys plaggen med funktionsdetaljer upp för att slutligen graderas. Avslutningsvis skapas måttlistor för samtliga plagg som baserar sig på framtagen gradering och som slutligen överlämnas till företaget.The main purpose of this study is to create measurement charts for three garments for children with functional features. Garments are graded to control measurements before being sent to production. The study is created in collaboration with a company who contributes with fabric, garment samples and guidance.The method of this study is mainly experimental in form of construction, grading and sewing. Literature is used as reference for the experimental parts of the study. The main focus is grading the garment which involves 12 sizes, 86-152 centilong. Functional features and fit are also a part of the study.The report examines the equity of grading in a large size range that doesn’t correspond with the chosen literature. Furthermore the study examines if the same collar construction can be used for two different jackets and how a raglan sleeve should be graded without reducing the movement in the sleeve.Result is created by measuring and evaluating samples from the company. New garments are constructed, graded and sewn as final samples with functional features. Finally measurement charts are created based on the grading and are presented to the company.Program: Designteknikerutbildningen
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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.
Повний текст джерелаАнотація:
Stiffnes of leg's receiver and skin and soft tissues at contact place are researched in the master thesis. Using the finite elements method with digital ANSYS programmable packet was made non-linear model of leg's prothesis receiver and stump of soft tissues . Made calculiation have shown that deformation ratio in stump and receiver contact declines when the lood increases. Therefore it is very important to evaluate not only the height of desabled persion but also his weight durind estimation the magnitude of deviations of leg prosthesis manufacturing and assembly.
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Ener, Emrah. "Recognition Of Human Face Expressions." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/3/12607521/index.pdf.
Повний текст джерелаАнотація:
In this study a fully automatic and scale invariant feature extractor which does not require manual initialization or special equipment is proposed. Face location and size is extracted using skin segmentation and ellipse fitting. Extracted face region is scaled to a predefined size, later upper and lower facial templates are used for feature extraction. Template localization and template parameter calculations are carried out using Principal Component Analysis. Changes in facial feature coordinates between analyzed image and neutral expression image are used for expression classification. Performances of different classifiers are evaluated. Performance of proposed feature extractor is also tested on sample video sequences. Facial features are extracted in the first frame and KLT tracker is used for tracking the extracted features. Lost features are detected using face geometry rules and they are relocated using feature extractor. As an alternative to feature based technique an available holistic method which analyses face without partitioning is implemented. Face images are filtered using Gabor filters tuned to different scales and orientations. Filtered images are combined to form Gabor jets. Dimensionality of Gabor jets is decreased using Principal Component Analysis. Performances of different classifiers on low dimensional Gabor jets are compared. Feature based and holistic classifier performances are compared using JAFFE and AF facial expression databases.
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Steinholtz, 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.
Повний текст джерелаАнотація:
In this thesis, two different architecture designs of a Multi-Layer Perceptron network have been implemented. One architecture being an ordinary MLP, and in the other adding DenseNet inspired skip connections to an MLP architecture. The models were used and evaluated on the classification task, where the goal was to classify if subjects were diagnosed with Parkinson’s disease or not based on vocal features. The models were trained on an openly available dataset for Parkinson’s classification and evaluated on a hold-out set from this dataset and on two datasets recorded in another sound recording environment than the training data. The thesis searched for the answer to two questions; How insensitive models for Parkinson’s classification are to the sound recording environment and how the proposed skip connections in an MLP model could help improve performance and generalization capacity. The thesis results show that the sound environment affects the accuracy. Nevertheless, it concludes that one would be able to overcome this with more time and allow for good accuracy when models are exposed to data from a new sound environment than the training data. As for the question, if the skip connections improve accuracy and generalization, the thesis cannot draw any broad conclusions due to the data that were used. The models had, in general, the best performance with shallow networks, and it is with deeper networks that the skip connections are argued to help improve these attributes. However, when evaluating on the data from a different sound recording environment than the training data, the skip connections had the best performance in two out of three tests.I 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.
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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.
Повний текст джерелаАнотація:
This thesis provides a description of the periglacial environment and features in the vicinity of Tiffindell Ski resort, on the slopes of Ben MacDhui (3001.2m.), the highest point of the East Cape Drakensberg, South Africa. Active and inactive periglacial features were located, mapped and described. Of particular interest were periglaciar slope deposits including gelifluction turf-banked lobes and stone lobes, and cryoturbation features including polygons and thufur. Local environmental factors, such as aspect, moisture, topography, soil texture and depth of freezing, appear to act as important controls on the spatial distribution of the periglacial features. Identification and quantification of periglacial processes in the regolith was investigated using temperature and soil moisture sensors coupled to dataloggers. Research was undertaken over a 16 month period from June 1995 to September 1996 so that comparisons between the winter conditions of 1995 and 1996 could be drawn. The Tiffindell area was observed to be characterised in the winter months by 'diurnal freezethaw days', as well as by 'ice days', 1996 experiencing colder temperatures than 1995. With more than 78% of the days from May to September 1996 being 'ice days', and simultaneously experiencing high soil moisture contents, freezing penetration to a depth of greater than 0.2m was observed to occur in the Tiffindell area, causing frost heave and gelifluction. The summer thaw of ice lenses that developed in the cold winter months caused surface movement downslope of gelifluction lobes of up to 39mm over an 18 month period, although movement declined rapidly with depth and was essentially restricted to the uppermost 130mm of the regolith. Other features such as sorted and non-sorted polygons and thufur were identified and found to be active under the present climatic conditions and depth of frost penetration at Tiffindell. Stone lobes were identified on the south and southeast-facing slopes at Tiffindell, but are apparently inactive under present climatic conditions. Their existence suggests the presence of severe seasonal frost in the past. The implications of the air and ground surface temperatures, and of seasonal frost penetration for the development of Tiffindell Ski resort were considered, and suggestions regarding their economic significance are presented.
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Abdallah, Abdallah Sabry. "Investigation of New Techniques for Face detection." Thesis, Virginia Tech, 2007. http://hdl.handle.net/10919/33191.
Повний текст джерелаАнотація:
The task of detecting human faces within either a still image or a video frame is one of the most popular object detection problems. For the last twenty years researchers have shown great interest in this problem because it is an essential pre-processing stage for computing systems that process human faces as input data. Example applications include face recognition systems, vision systems for autonomous robots, human computer interaction systems (HCI), surveillance systems, biometric based authentication systems, video transmission and video compression systems, and content based image retrieval systems.
In this thesis, non-traditional methods are investigated for detecting human faces within color images or video frames. The attempted methods are chosen such that the required computing power and memory consumption are adequate for real-time hardware implementation. First, a standard color image database is introduced in order to accomplish fair evaluation and benchmarking of face detection and skin segmentation approaches. Next, a new pre-processing scheme based on skin segmentation is presented to prepare the input image for feature extraction. The presented pre-processing scheme requires relatively low computing power and memory needs. Then, several feature extraction techniques are evaluated. This thesis introduces feature extraction based on Two Dimensional Discrete Cosine Transform (2D-DCT), Two Dimensional Discrete Wavelet Transform (2D-DWT), geometrical moment invariants, and edge detection. It also attempts to construct a hybrid feature vector by the fusion between 2D-DCT coefficients and edge information, as well as the fusion between 2D-DWT coefficients and geometrical moments. A self organizing map (SOM) based classifier is used within all the experiments to distinguish between facial and non-facial samples. Two strategies are tried to make the final decision from the output of a single SOM or multiple SOM. Finally, an FPGA based framework that implements the presented techniques, is presented as well as a partial implementation.
Every presented technique has been evaluated consistently using the same dataset. The experiments show very promising results. The highest detection rate of 89.2% was obtained when using a fusion between DCT coefficients and edge information to construct the feature vector. A second highest rate of 88.7% was achieved by using a fusion between DWT coefficients and geometrical moments. Finally, a third highest rate of 85.2% was obtained by calculating the moments of edges.Master of Science
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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.
Повний текст джерелаАнотація:
When species compete for resources, in a stable homogeneous environment, there are two possible outcomes. The first is that one species will out-compete the other and exclude it from the environment. This is known as the competitive exclusion principle. The second is that both species will manage to coexist. Coexistence can only occur if the species niches are differentiated such that interspecific competition is minimised, or eliminated. This outcome is known as resource partitioning.
Two closely related Australian skink species of the Egernia genus, Egernia multiscutata and Egernia whitii, are abundant and sympatric on Wedge Island in South Australias Spencer Gulf. The species are morphologically very similar and appear to have very similar life histories and habitat requirements. Ostensibly, they would compete for limiting resources in this environment.
This thesis is the first investigation into resource partitioning in this previously unstudied model organism. I report the results of multi-faceted investigations into the coexistence of the skinks, E. multiscutata and E. whitii on Wedge Island and the evidence for, and mechanisms of, any facultative resource partitioning between them.
Study methods involved a transect survey of most of Wedge Island to determine the species distributions and any evidence for resource partitioning; a morphological comparison to investigate any potential competitive advantages of either species; a habitat choice experiment to establish retreat-site preferences in the absence of interspecific interference; and, a series of staged dyadic encounter experiments to investigate interspecific competitive interactions.
Resource partitioning was evidenced by differential distributions of the species among substrates containing the elements required for permanent refuge shelters. This partitioning was not mediated by avoidance of particular substrates but by the presence of the opponent species, combined with attraction to suitable substrates. Asymmetries in some morphological characters were found to confer a potential competitive advantage to E. multiscutata in agonistic encounters with E. whitii. Both species were found to have the same refuge site preferences when interference competition was experimentally removed. This result was not concordant with observed resource partitioning in the field and suggests that the habitat choices of both species are modified by the presence of the opponent species. Analyses of staged dyadic encounter experiments showed that E. multiscutata was more likely to gain greater access to a contested habitat resource and more likely to exclude E. whitii from the resource than vice-versa. Nevertheless, the outcome of competitive interactions was not completely deterministic and there was some tolerance of co-habitation. E. multiscutatas competitive advantage was attributable largely to its greater mass and head dimensions relative to snout to vent length. However, differential behavioural responses to the threat of larger opponent size also played an important part in resource partitioning between the species.
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Soares, 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.
Повний текст джерелаАнотація:
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Previous issue date: 2008-02-22Conselho 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
28
Yang, Sheng-wen, and 楊勝文. "Face Detection Using Skin Color and Facial Features." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/42669186798181792813.
Повний текст джерелаАнотація:
碩士逢甲大學
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.
29
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.
Повний текст джерелаАнотація:
碩士龍華科技大學
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.
30
魏銘輝. "Combination of Skin Color and Appearance Features for Face Detection." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/97252300079909995272.
Повний текст джерелаАнотація:
碩士中華大學
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.
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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.
Повний текст джерелаАнотація:
碩士元智大學
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.
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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.
Повний текст джерелаАнотація:
Dissertação de mestrado em Tecnologias do Medicamento, apresentada à Faculdade de Farmácia da Universidade de CoimbraA 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.
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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.
Повний текст джерелаАнотація:
碩士國立臺灣科技大學
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.
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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.
Повний текст джерелаАнотація:
碩士朝陽科技大學
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.
35
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.
Повний текст джерела
36
Lé, 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.
Повний текст джерела
37
Huang, Chih-Wei, and 黃志偉. "Exploring the Effect on Video Skim with Feature Film." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/82642753871891975508.
Повний текст джерелаАнотація:
碩士長榮大學
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.
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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.
Повний текст джерелаАнотація:
碩士國立交通大學
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.
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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.
Повний текст джерелаАнотація:
碩士國立中央大學
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.
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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.
Повний текст джерелаАнотація:
碩士元智大學
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.
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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.
Повний текст джерелаАнотація:
碩士中華大學
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.