This thesis proposes a method for changing the lighting in some types of images. The method requires only a single input image, either a studio photograph or a synthetic image, consisting of several simple objects placed on a uniformly coloured background. Based on 2D information (contours, shadows, specular areas) extracted from the input image, the method reconstructs a 3D model of the original lighting and and 2.5D models of objects in the image. It then modifies the appearance of shading and shadows to achieve relighting. It can produce visually satisfactory results without a full 3D description of the scene geometry, and requires minimal user assistance. While developing this method, the importance of different cues for understanding 3D geometry, such as contours or shadows, were considered. Constraints like symmetry that help determine surface shapes were also explored. The method has potential application in improving the appearance of existing photographs. It can also be used in image compositing to achieve consistent lighting.

This thesis proposes a method for changing the lighting in some types of images. The method requires only a single input image, either a studio photograph or a synthetic image, consisting of several simple objects placed on a uniformly coloured background. Based on 2D information (contours, shadows, specular areas) extracted from the input image, the method reconstructs a 3D model of the original lighting and and 2.5D models of objects in the image. It then modifies the appearance of shading and shadows to achieve relighting. It can produce visually satisfactory results without a full 3D description of the scene geometry, and requires minimal user assistance. While developing this method, the importance of different cues for understanding 3D geometry, such as contours or shadows, were considered. Constraints like symmetry that help determine surface shapes were also explored. The method has potential application in improving the appearance of existing photographs. It can also be used in image compositing to achieve consistent lighting.

It is observed that the power consumption of road lighting is increased with the length of trafficable road in Hong Kong. The energy used in road lighting is increasing, which means that the greenhouse gases (GHGs) emitted from power plant for generating electricity for road lighting is at the same time increasing. To compare the performance of light emitted diode (LED) road lighting with road lighting of other lamp sources, literature review, life cycle assessment (LCA) and technical assessment are adopted to give an overall comparison. This research focuses more on the environmental impacts of road lighting. LCA is adopted in order to give a comprehensive view on the environmental impact of road lighting. A total of 3 different lamp sources are compared: high pressure sodium (HPS) lamp, induction lamp and light emitted diode (LED) lamp. From the model result, it is found that due to the low power consumption and long life time, LED and induction lamp road lighting gives generally less environmental impact than HPS road lighting. As induction lamp has a longer life span than LED, the environmental impact of induction lamp road lighting is found slightly less than that of LED road lighting. Taking account the future development in LED technology, leading to longer life time, higher efficacy and lower production cost, LED road lighting is expected to be a replacement for road lighting in Hong Kong for the future. / published_or_final_version / Environmental Management / Master / Master of Science in Environmental Management

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The subject of this scientific research is urban artistic lighting, analyzed herein as a means for highlighting the urban and architectural features and aimed at evaluation of aesthetic qualities of the nightscape depending on its illumination. Aesthetic (application and keeping to the beauty criteria) illumination development, contemporary trends and their influences on the nightscape formation is under analysis in the present work. Any psychological, physiological, ecological, economical, different technological and any other aspects are analyzed only in so far as they are related to the field of art criticism. The development analysis covers the entire history of human kind with the main focus being made on the period starting with electricity invention and spread of lighting, i. e. from the second half of the 19th century till nowadays, in foreign, as well as Lithuanian practice. / Darbo mokslinių tyrimų objektas – miestų meninis apšvietimas, kuris nagrinėjamas kaip urbanistikos ir architektūros požymius išryškinanti priemonė, siekiant įvertinti naktinio miestovaizdžio estetines kokybes ir jų priklausymą nuo apšvietimo. Nagrinėjama estetinė (grožio kriterijų taikymas ir laikymasis) apšvietimo raida, šiuolaikinės tendencijos ir įtaka naktinio miestovaizdžio formavimui. Psichologinis, fiziologinis, ekologinis, ekonominis, įvairūs technologiniai ir kiti aspektai nagrinėjami tik tiek, kiek yra susiję su menotyros sritimi. Raidos tyrimas apima visą žmonijos istoriją, tačiau dėmesys telkiamas į laikotarpį nuo elektros apšvietimo išplitimo, t. y. nuo XIX a. pabaigos, iki šių dienų.

No description available.

In this study, we investigate various lighting applications in a virtual environment, where we compare between light based in naturalism (natural light) and pictorialism (artistic light). The purpose of this study is to gain further knowledge in lighting, which is increasingly important for game graphics. Theory are examined to gather information and recommendations on how to use various light settings that convey different emotions. We then use this information to illuminate the environment that we have built. The environment is presented in Unreal 4 for respondents who are allowed to move around freely in the environment. Then we carry out qualitative, semi-structured interviews at the respondents to find out what they thought of the light. The result showed that natural light did not give the same narrative effect as unnatural light.

Thesis (Ph. D. in Chemistry)--University of California, Berkeley, October 1958. / Part II of the thesis "high intensity light sources" see UCRL-8509. "UCRL-8508" Includes bibliographical references : p. 98-100.

Thesis (Ph. D.)--University of Wisconsin--Madison, 1969. / Typescript. Vita. Includes bibliography.

Thesis (M.S.)--California Polytechnic State University, 2010. / Title from PDF title page; viewed on May 10, 2010. Major professor: Jianbiao Pan, Ph.D. "Presented to the faculty of California Polytechnic State University, San Luis Obispo." "In partial fulfillment of the requirements for the degree [of] Master of Science in Industrial Engineering." "March 2010." Includes bibliographical references (p. 88-93).