No description available.

Thesis (MScAgric)--Stellenbosch University, 1963. / ENGLISH ABSTRACT: no abstract available / AFRIKAANSE OPSOMMING: geen opsomming

In the field of information sciences, attention has been focused on developing mature information retrieval systems that abstract information automatically from the contents of information resources, such as books, images and films. As a subset of information retrieval research, content-based image retrieval systems automatically abstract elementary information from images in terms of colors, shapes, and texture. Color is the most commonly used in similarity measurement for content-based image retrieval systems. Human-computer interface design and image retrieval methods benefit from studies based on the understanding of their potential users. Today's children are exposed to digital technology at a very young age, and they will be the major technology users in five to ten years. This study focuses on children's color perception and color association with a controlled set of digital images. The method of survey research was used to gather data for this exploratory study about children's color association from a children's population, third to sixth graders. An online questionnaire with fifteen images was used to collect quantitative data of children's color selections. Face-to-face interviews investigated the rationale and factors affecting the color choices and children's interpretation of the images. The findings in this study indicate that the color children associated with in the images was the one that took the most space or the biggest part of an image. Another powerful factor in color selection was the vividness or saturation of the color. Colors that stood out the most generally attracted the greatest attention. Preferences of color, character, or subject matter in an image also strongly affected children's color association with images. One of the most unexpected findings was that children would choose a color to replace a color in an image. In general, children saw more things than what were actually represented in the images. However, the children's interpretation of the images had little effect on their color selections.

A procedure in which the S- was prevented from being responded to, by electro-magnets, was used to establish color discriminations. The procedure was modified in Situation 1, to include the prevention of responses to the S+ if the S- was responded to first. The original procedure and modified procedure were used in Situation 1, with only the modified procedure being used in Situations 2 and 3. The procedure of reinforcing responses to the S+ and extinguishing responses to the S-, through nonreinforcement, was used in Situation 4. Data recorded consisted of the number of trials, the number of reinforcements, and which stimulus was first responded to. Criteria for the acquisition of a discrimination was 100 first responses to the S+. Results indicated that the modified procedure was much more effective in establishing the discriminations, than the original procedure or the procedure of reinforcing responses to the S+ and extinguishing responses to the S-. The modified procedure enhanced the establishment of stimulus control, reduced the number of errors and eliminated stereotyped responses.

In the field of computer vision and more specifically multi-camera systems color correction is an important topic of discussion. The need for color-tone similarity among multiple images that are used to construct a single scene is self-evident. The strength and weaknesses of color- correction methods can be assessed by using metrics to measure structural and color-tone similarity and timing the methods. Color transfer has a better structural similarity than histogram-based prefiltering and a worse color-tone similarity. The color transfer method is faster than the histogram-based prefiltering. Color transfer is a better method if the focus is a structural similar image after correction, if better color-tone similarity at the cost of structural similarity is acceptable histogram-based prefiltering is a better choice. Color transfer is a faster method and is easier to run with a parallel computing approach then histogram-based prefiltering. Color transfer might therefore be a better pick for real-time applications. There is however more room to optimize an implementation of histogram-based prefiltering utilizing parallel computing.

Esta dissertação trata do estudo da percepção visual da cor existente nos elementos arquitetônicos da paisagem urbana, com o objetivo de verificar a quantidade e a qualidade cromática presente em edificações de uma determinada área de recorte, bem como verificar as possíveis relações dos atributos de cor deste levantamento. Pretende ainda apresentar as relações cromáticas que se estabelecem entre as unidades edificadas e seu entorno direto, percebidas por meio da visão serial. A metodologia adotada para a verificação dos dados cromáticos, em termos quantitativos e qualitativos da cor, é constituída de um levantamento in loco com a utilização de aparelho portátil para leitura de superfície, o qual, por sua vez, é vinculado a um sistema de notação cromática próprio denominado Natural Colour System (NCS). Já na aplicação da metodologia da visão serial foram utilizados os recursos da fotografia e do desenho com o objetivo de registrar a percepção cromática dos mesmos elementos arquitetônicos. Para escolher a área de estudo, fez-se um recorte em local específico no bairro da Vila Madalena, São Paulo, onde se buscou ruas compostas por edificações preferencialmente de ocupação residencial, com características específicas em termos de tipologia: com até dois pavimentos, ocupando lotes de mesmas dimensões, apresentando, de forma geral, homogeneidade na área. Dentro deste perfil, determinou-se um percurso para aplicar a metodologia da visão serial de Gordon Cullen, com o objetivo de estudo da percepção da cor na paisagem urbana, servindo-se da fotografia sequenciada como recurso para detectar os contrastes cromáticos. Nesse método foram feitos ajustes na frequência dos registros das imagens e houve ainda uma variação na perspectiva visual. O resultado da pesquisa é a apresentação de tabela com as cores existentes no local e a avaliação das metodologias para a percepção da cor na paisagem urbana. / The present thesis explores the visual perception of colors that exist in architectural elements of urban landscape, in order to examine color quantity and quality in buildings of a certain area as well as the possible relationships between the color attributes of this survey. It also aims to demonstrate the color relationships developed between the built units and their immediate surrounding perceived by serial vision. The methodology used to review the data about color quantity and quality was an on-site survey using a handheld device for scanning the surface, which is in turn linked to a specific color notation system called NCS. As for the serial vision methodology, photography and drawing were used in order to record color perception of the same architectural elements. The choice of the area to be studied was made by demarcating a specific location in the neighborhood of Vila Madalena, in the city of São Paulo. The target was to have streets with a greater amount of residential buildings and with specific features: up to 2 floors, occupying equal-sized plots of land and having a mostly homogeneous area. Within this profile, a pathway was defined in order to apply the serial vision methodology of Gordon Cullen, aiming to study color perception in urban landscape using sequences of images as a tool to capture color contrasts. In this method, the frequency of images recorded was adjusted, and there was a change in visual perspective. The result of the research is a table comprised of the prevailing colors in that area and the assessment of methodologies for color perception in urban landscape.

Thesis. 1978. Elec.E.--Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science. / MICROFICHE COPY AVAILABLE IN ARCHIVES AND ENGINEERING. / Includes bibliographical references. / by Robert Roy Buckley, Jr. / Elec.E.

Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1981. / MICROFICHE COPY AVAILABLE IN ARCHIVES AND ENGINEERING. / Bibliography: leaf 84. / by Edward Ashford Lee. / M.S.

Lau Tsz Yam. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2005. / Includes bibliographical references (leaves 91-94). / Abstracts in English and Chinese. / Abstract --- p.i / Acknowledgement --- p.iii / Chapter 1 --- Introduction --- p.1 / Chapter 2 --- Characterization of Colour Deficiency --- p.7 / Chapter 2.1 --- Mechanism of colour vision --- p.7 / Chapter 2.2 --- Quantitative specification of colour --- p.10 / Chapter 2.3 --- Discrimination ellipses --- p.17 / Chapter 2.4 --- Colour perception of colour deficient people --- p.22 / Chapter 2.5 --- Luminance match of colour deficient people --- p.32 / Chapter 2.6 --- Diagnosis of colour deficiency --- p.32 / Chapter 2.7 --- Dichromat simulation algorithm --- p.35 / Chapter 3 --- Monocular Compensation --- p.37 / Chapter 3.1 --- Principle --- p.37 / Chapter 3.2 --- Potential problems without monocular compensation --- p.39 / Chapter 3.3 --- Existing monocular compensation implementations --- p.45 / Chapter 3.4 --- Compensation algorithm for monocular compensation --- p.47 / Chapter 4 --- Stereo Visual Display Unit - Monocular Compensation --- p.48 / Chapter 4.1 --- Gamut-based palette compression --- p.49 / Chapter 4.2 --- Compensation level --- p.56 / Chapter 4.3 --- Realizing transformed chromaticities --- p.59 / Chapter 5 --- Evaluation --- p.64 / Chapter 5.1 --- Extensiveness of compensation --- p.65 / Chapter 5.2 --- Combination of discriminations from the two eyes --- p.68 / Chapter 5.3 --- Discrimination improvement and visual comfort --- p.72 / Chapter 6 --- Conclusion and Future Works --- p.82 / Chapter A --- Raw Data of Experiment 53 --- p.85 / Bibliography --- p.91

Este estudo tem como objetivo entender o acontecimento cromático, desde a relação da cor com a luz, passando por fatores fisiológicos e cognitivos humanos, até a compreensão dos atributos que formam as cores, os contrastes e as sínteses cromáticas. Pretende-se, também, entender de que modo a utilização dos sistemas de notação cromática pode auxiliar na compreensão do cromatismo presente e como os métodos de leitura cromática, elaborados por Jean Philippe Lenclos e por Giovanni Brino, podem contribuir para o entendimento das cores existentes no local. Por fim, almeja-se compreender como os arquitetos podem se apropriar das cores de modo que sejam um instrumento eficiente na especificação cromática do projeto arquitetônico, definindo, de forma consciente e objetiva, um olhar inédito com relação ao colorido circundante. / This study aims to understand the chromatic occurrence, from the relationship of color with light, through human physiological and cognitive factors, to the understanding of the attributes that form colors, contrasts and chromatic syntheses. It also aims to comprehend how the use of chromatic notation systems can assist in understanding chromaticism and how the color reading methods developed by Jean Philippe Lenclos and Giovanni Brino can contribute in understanding existing colors on site. Finally, this study longs for studying how architects can use color as an efficient instrument in the chromatic specification of architectural design, setting, consciously and objectively, a unique look with a colorful surrounding.