Thesis (Ph. D.)--University of Texas at Austin, 1998. / Vita. Includes bibliographical references (leaves 176-183). Available also in a digital version from Dissertation Abstracts.

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Creating realistic-looking skin is one of the holy grails of computer graphics and is still an active area of research. The problem is challenging due to the inherent complexity of skin and its variations, not only across individuals but also spatially and temporally among one. Skin appearance and reflectance vary spatially in one individual depending on its location on the human body, but also vary temporally with the aging process and the body state. Emotions, health, physical activity, and cosmetics for example can all affect the appearance of skin. The spatially varying reflectance of skin is due to many parameters, such as skin micro- and meso-geometry, thickness, oiliness, and pigmentation. It is therefore a daunting task to derive a model that will include all these parameters to produce realistic-looking skin. The problem is also compounded by the fact that we are very well accustomed to the appearance of skin and especially sensitive to facial appearances and expressions. Skin modelling and rendering is crucial for many applications such as games, virtual reality, films, and the beauty industry, to name a few. Realistic-looking skin improves the believability and realism of applications. The complexity of skin makes the topic of skin modelling and rendering for computer graphics a very difficult, but highly stimulating one. Skin deformations and biomechanics is a vast topic that we will not address in this dissertation. We rather focus our attention on skin optics and present a simple model for the reflectance of human skin along with a system to support skin modelling and rendering.

The objectives of this study were threefold: to determine the prevalence of skin diseases among primary school children in the UAE; to assess the ability of the primary health care physicians (PCPs) to diagnose skin diseases; and to plan a dermatological education program for children of the UAE. An epidemiological survey included the clinical examination of selected school children by two quantified dermatologists and the relationships between the prevalence of skin diseases and a range of hygiene and socioeconomic factors were examined.1536 Local schoolchildren aged 6-9 years were included. The prevalence of common skin diseases in the children was 19%. The most common skin diseases included: dermatitis (8.1%), viral diseases (3.8%), and pigmentation disorders (1.7%). Selected skin diseases showed significant associations with a range of socioeconomic and hygiene factors on multivariate analyses. Physicians were better at correctly diagnosing common skin diseases compared with the less frequent, or rare skin diseases. Finally, PCPs with specific training in dermatology showed more ability to diagnose a range of skin diseases compared with those with no relevant training. Based on the results of this study, an improvement in socioeconomic and personal hygiene conditions along with the initiation of pertinent educational programs for children, patients and teachers may reduce the prevalence of some skin disorders. Important aspects of such dermatological health care programs are proposed. In addition, specific dermatological training for PCPs should be considered to increase their ability to diagnose and manage common skin diseases in children.

Creating realistic-looking skin is one of the holy grails of computer graphics and is still an active area of research. The problem is challenging due to the inherent complexity of skin and its variations, not only across individuals but also spatially and temporally among one. Skin appearance and reflectance vary spatially in one individual depending on its location on the human body, but also vary temporally with the aging process and the body state. Emotions, health, physical activity, and cosmetics for example can all affect the appearance of skin. The spatially varying reflectance of skin is due to many parameters, such as skin micro- and meso-geometry, thickness, oiliness, and pigmentation. It is therefore a daunting task to derive a model that will include all these parameters to produce realistic-looking skin. The problem is also compounded by the fact that we are very well accustomed to the appearance of skin and especially sensitive to facial appearances and expressions. Skin modelling and rendering is crucial for many applications such as games, virtual reality, films, and the beauty industry, to name a few. Realistic-looking skin improves the believability and realism of applications. The complexity of skin makes the topic of skin modelling and rendering for computer graphics a very difficult, but highly stimulating one. Skin deformations and biomechanics is a vast topic that we will not address in this dissertation. We rather focus our attention on skin optics and present a simple model for the reflectance of human skin along with a system to support skin modelling and rendering.

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Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1993. / Vita. Abstract. Includes bibliographical references (leaves 87-94). Also available via the Internet.