Colour Vision
Mostrando 1-12 de 122 artigos, teses e dissertações.
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1. Applicability of computer vision in seed identification: deep learning, random forest, and support vector machine classification algorithms
ABSTRACT The use of computer image analysis can assist the extraction of morphological information from seeds, potentially serving as a resource for solving taxonomic problems that require extensive training by specialists whose primary method of examination is visual identification. We propose to test the ability of deep learning, SVM and random forest algo
Acta Bot. Bras.. Publicado em: 2021-03
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2. Avaliação e estabilidade da cor em filés de burriquete (Pogonias cromis) utilizando um sistema de visão computacional
Resumo A cor da superfície da carne é a primeira sensação que o consumidor percebe e utiliza como uma ferramenta para aceitar ou rejeitar um alimento. A medição e a avaliação da cor da carne podem também ser feitas por um indicador químico (metamioglobina) ou pela avaliação física, utilizando espaços da cor (a* e R). O objetivo deste trabalho f
Braz. J. Food Technol.. Publicado em: 13/06/2019
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3. Computer vision system approach in colour measurements of foods: Part II. validation of methodology with real foods
Abstract The colour of food is one of the most important factors affecting consumers’ purchasing decision. Although there are many colour spaces, the most widely used colour space in the food industry is L*a*b* colour space. Conventionally, the colour of foods is analysed with a colorimeter that measures small and non-representative areas of the food and t
Food Sci. Technol. Publicado em: 14/06/2016
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4. Computer vision system approach in colour measurements of foods: Part I. development of methodology
Abstract The colour assessment ability of the computer vision system is investigated and the data are compared with colour measurements taken by a conventional colorimeter. Linear and quadratic models are built to improve currently used methodology for the conversion of RGB colour units to L * a * b * colour space. For this purpose, two innovative idea
Food Sci. Technol. Publicado em: 31/05/2016
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5. Relação entre funções cognitivas e perdas adquiridas na visão de cores de pacientes com esclerose múltipla tipo remitente recorrente / Relationship between cognitive functions and acquired color vision loss in patients with relapsing-remitting type of multiple sclerosis
Multiple sclerosis (MS) is an autoimmune inflammatory disease characterized by demyelination and central nervous system (CNS) degeneration. It is two times more frequent in women. It can be presented in two subtypes: the relapsing-remitting (RR), most common type, characterized by two or more episodes of focal disorders in different sites of the CNS, and rem
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 12/09/2012
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6. Comparison of two computerized procedures for the assessment of color discrimination in Cebus apella
Color vision consists of the discrimination of objects based on their spectral composition. Among primates, the majority of Platyrrhini monkeys are estimated to have polymorphic and sex-linked dichromacy. The objective of this study was to compare the results produced by different equipment and software for the assessment of tri- and dichromatic conditions i
Psychology & Neuroscience. Publicado em: 2011-12
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7. Estudos dos pigmentos visuais de macaco-prego (cebus sp) e da relação entre a psicofísica e a genética da visão de cores em humanos / Study of the visual pigments from capuchin monkey (Cebus sp) and the psychophysics and the genetics colour vision relationship in humans
Color vision is possible due to different types of photoreceptors and to the post receptoral processing of the information generated after cell activation by the light. Genetic, functional and morphological analysis can be used as tools in the color vision studies. In the present work the genetic of the visual pigments from Cebus sp and the genetic and the p
Publicado em: 2011
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8. Avaliação da Visão Funcional (AVIF) para crianças de dois a seis anos com baixa visão: exame de confiabilidade e de validade
The AVIF-2 to 6 years is a method of Functional Vision Assessment for children with low vision. It was developed by a Physical Therapist and an Occupational Therapist from the Childrens Low Vision Clinic at the São Geraldo Hospital (Clinics Hospital, at UFMG - Federal University of Minas Gerais). In this study, the psychometric characteristics (reliability
Publicado em: 2010
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9. Avaliação da capacidade de discriminação do sinal cromático da "pele sexual" do Cebus libidinosus
Diferentemente dos primatas do Velho Mundo que possuem tricromacia uniforme, os primatas do Novo Mundo apresentam um polimorfismo da visão de cores relacionado ao sexo, no qual todos os machos são dicromatas e as fêmeas podem ser dicromatas ou tricromatas. Estudos sugerem algumas implicações ecológicas da visão de cores na identificação de alimentos
Publicado em: 2010
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10. Caracterização cromática das fontes alimentares de origem vegetal do sagui-do-cerrado (Callithrix penicillata, PRIMATES)
The colour vision ability depends on the presence of different classes of retinal photoreceptors and subsequent compatible neural tracts. The basic mammalian colour vision status is dichromacy, resulting of the presence of two different types of cones. Primates and some marsupials are exceptions for this status, which may present trichromatic colour vision.
Publicado em: 2006
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11. SISTEMA DE CONTAGEM DE PESSOAS / PEOPLE COUNTING SYSTEM
There is worldwide an increasing concern about security issues. A great deal of efforts have been undertaken in order to provide surveillance systems. This work proposes an automatic method to determine the number of people moving in an area monitored by a video camera, as well as to detect image changes, which are potentially due to illicit attitudes. A typ
Publicado em: 2005
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12. Visão de cores e sensibilidade ao contraste em indivíduos com diabete melito: avaliação psicofísica e eletrofisiológica / Color vision and contrast sensitivity in subjects with diabetes mellitus : psychophysical and electrophysiological evaluation
Before the establishment of retinopathy detectable in the ophthalmologic examination, color vision and contrast sensitivity may be altered in diabetic patients. (Dean e cols., 1997; Kurtenbach e cols., 1999). The sensory deficits have been attributed to vascular alterations and to (Greenstein e cols., 2000; Lieth e cols., 2000). However, there are no definit
Publicado em: 2004