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from retinal color processing to the cortical level; and to present a computational model based on neuroanatomical data for human color vision. ... Presently there are two dominant theories for human color vision: Young-Maxwell-Helmholtz's trichromatic theory and Hering's opponent-color theory. ... from retinal color processing to the cortical level; and to present a computational model based on neuroanatomical data for human color vision. ...doi:10.1186/1471-2202-11-s1-p143 pmcid:PMC3090847 fatcat:epzddbosafeyvimbmencc3gbny
Optometry and Vision Science
version of the Young-Helmholtz theory, that three sepa- rate sets of photoreceptors and retino-cortical pathways are necessary to subserve color vision, and the inhibitory mechanism is duplicated for each ... °, A theory of color contrast based on the modulation theory of color vision has been proposed in a previous paper?? ...
Optometry and Vision Science
COLOR—AV ERA With these two usages of three primary colors, any pure hue, in the wave-length sense of the physicist, can be duplicated in man’s cortical recognizance mechanism. ... The Hering theory of vision, in contradiction to the Helmholtz con- cept, ignores the tri-chromatic nature of the three primary color sources and states that it is what we cortically “‘see’’ that is important ...
COLOR—AV ERA With these two usages of three primary colors, any pure hue, in the wave-length sense of the physicist, can be duplicated in man’s cortical recognizance mechanism. ... The actual mechanics involved in the primal origin of color spectra, as well as its ultimate cortical cognition by man, is shrouded by the lack of a completely satisfactory understanding. ...doi:10.1097/00006324-193901000-00003 fatcat:nqny7guldndy3dewi7lwir3u5u
16 The study of color vision encompasses many disciplines, including art, biochemistry, 17 biophysics, brain imaging, cognitive neuroscience, color preferences, colorimetry, computer 18 modelling, design ... Coupled with the elusive nature 20 of the subjective experience of color, this wide range of disciplines makes the study of color as 21 challenging as it is fascinating. ... There is now a consensus that the population of cortical neurons in V1 (and 24 almost every other cortical area studied) have tunings that span a broad range of color directions 25 (reviewed by Gegenfurtner ...doi:10.1016/j.visres.2018.06.009 pmid:29959956 fatcat:nsmx2zgt65fnzcpvs4gdwbffv4
for the representation of peripheral phenomena, the nature of the central relay mechanisms, and the nature of the cortical representation of peripheral visual phenomena. ... Some experiments dealing with the comparative neuropsychology of vision were reviewed. ... The "on" cells were shown to regulate brightness and color vision, the "on-off' cells were shown to regulate color vision, and the "off' cells were shown to regulate brightness vision. ...doi:10.3758/bf03333735 fatcat:lf6jydkwn5aplc7p3vojrz2nyu
Proposed physiological mechanisms for color afterimages range from bleaching of cone photopigments to cortical adaptation, but direct neural measurements have not been reported. ... JOURNAL OF OPHTHALMIC AND VISION RESEARCH 2012; Vol. 7, No. 1 Neural Locus of Color Afterimages Qasim Zaidi Graduate Center for Vision Research, SUNY College of Optometry, New York, USA ...pmid:22737398 pmcid:PMC3381099 fatcat:wm6kpj65n5dr7nef3k75epg5ma
Thus, specific phenomena in color vision, such as color induction and color constancy, may be achieved with neural mechanisms that are also operative in the processing of other features. ... The cortical representation of sensory information may be particularly suited to support important processing mechanisms such as lateral modulatory interactions. ...doi:10.24636/vision.20.2_77 fatcat:txeqppinajdmpi454uisx65zne
Color percep- tion is a necessary element in the protective mechanism. ... The case therefore cannot be said to be a pure visual dissociation with retention of color vision, since there is a considerable actual loss of vision as a whole, and one must make certain allowance in ...
As Koffka (32, p. 123) has remarked, form vision and color vision appear to be closely related; where form vision is disturbed, color vision tends also to be disturbed. 12 That the cortical mechanisms ... There is a suggestive analogy between peripheral vision and the defect of form perception (amblyopia) which, along with achromatopsia, is frequently found in cases of cortical lesion. ...
We review how neurons in the principal pathway connecting the retina to the visual cortex represent information about the chromatic and spatial characteristics of the retinal image. ... Our discussion is inclined toward studies on old-world monkeys and where possible emphasizes quantitative work that has led to or illuminates models of visual signal processing. ... Cortical Color Coding Because so much psychophysical work on color vision has been focused on mechanisms that sit early in the visual pathway-the nature and spectral sensitivities of the three receptors ...doi:10.1364/josaa.22.002013 pmid:16277273 fatcat:t4aboojwl5eepi2cqvzeepet5q
Described is a possible mechanism of binocular fusion In visual system based on continlous estimation of resulting "cortical image" doubling degree during vergenoe eye movements. ... A sequence of information processing stages in binocular vision preceding recognition is discussed. ... with the part of scene located in the region of central vision. ...dblp:conf/ijcai/Levashov75 fatcat:zxpus2bdw5hdbo6r42evf2fwwa
It is postulated that this mechanical mixture of white thus acts as a diluent to the cortical response value of the specific hue stimulus. ... The theories and practices of color vision and color harmony owe much of the apparent conflict between the views of psy- chology and physics to the fact that the relativity of such authentic empirical ...doi:10.1097/00006324-194110000-00003 fatcat:xgeelhe32rfpjhuimfobbepgxe
Our collective open out the potential of blind children, and found through a period training of time, some children by touch or nose or ear can distinguish different colors, even simple figure and numbers ... then grow out new synapse and dendrite, and the feeling system, hearing system, smell system, etc., may joint to visual system, and form a new neural network, and achieve finally a transformation among vision ... Zhu Tian-Min for powerful finance on the training of blind children, and our collective members Zhang Zhi-Qiang, Zhang Wen-Hua, Shen Tao, Deng Jian-Hua and Li Ni-Wei for their positive contributions, and ...doi:10.14704/nq.2013.11.3.687 fatcat:zawcnphuhrfuvoh7xjctzbab7y
Journal of Vision
This process can be thought of as a general mechanism for eliminating unnecessary cells in the nervous system. ... Removing the contributions to the surround from cells of the same cone type improves the signal-to-noise ratio of the chromatic signals. ... This mechanism does not obviate the need for the unsupervised cortical learning mechanisms to construct plausible cortical receptive fields, and something like the translation-invariance learning mechanism ...doi:10.1167/16.4.45 fatcat:ynwxwviymna6zioi7qqcsebi6a
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