Color vision and image intensities: When are changes material?

  title={Color vision and image intensities: When are changes material?},
  author={J. Rubin and W. Richards},
  journal={Biological Cybernetics},
  • J. Rubin, W. Richards
  • Published 2004
  • Mathematics, Medicine, Computer Science
  • Biological Cybernetics
The difficulty in understanding a biological system or its components without some idea of its goals has been emphasized by Marr. In this paper, a preliminary goal for color vision is proposed and analyzed. That goal is to determine where changes of material occur in a scene (using only spectral information). The goal is challenging because the effects of many processes (shadowing, shading from surface orientation changes, highlights, variations in pigment density) are confounded with the… Expand
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Visual information, in the form of images and video, comes from the interaction of light with objects. Illumination is a fundamental element of visual information. Detecting and interpretingExpand
Color improves edge classification in human vision
The role that color (chromatic) cues play in edge classification is explored, suggesting that color information facilitates the identification of material properties, transparency, shadows and the perception of shape-from-shading. Expand
Color constancy and the functional significance of McCollough effects
It is suggested that error-correction may be linked functionally to the experimentally induced illusory colored aftereffects known as McCollough effects (MEs) and the broader implications of these findings are discussed by considering the complementary functional roles performed by RFs mediating color-spatial interactions in the primate visual system. Expand
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This work focuses on the problem of shadow removal and shows that a simple, one-dimensional reintegration of gradient fields yields artifact-free, shadow-free images. Expand
Color in complex scenes.
This review focuses on color in complex scenes, which have regions of different colors in view simultaneously and/or successively, as in natural viewing, including color constancy, and chromatic contributions to such percepts as orientation, contour, depth, and motion. Expand
Color brings relief to human vision
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By psychophysical measurements, this finding establishes a new role for color vision in determining the three-dimensional structure of an image: one that exploits the natural relationships that exist between color and luminance in the visual world. Expand
Texture Variations Suppress Suprathreshold Brightness and Colour Variations
Discriminating material changes from illumination changes is a key function of early vision. Luminance cues are ambiguous in this regard, but can be disambiguated by co-incident changes in colour andExpand
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This review explores the cues, or regularities in the visual world that evidence suggests vision exploits to discriminate light from material, and proposes a set of heuristics that may guide vision in the task of distinguishing between light and material. Expand
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The results of this investigation into how well human-marked object contours can be predicted from achromatic and chromatic edge contrast conclude that chromatic information is important for object-contour perception. Expand
neural mechanisms of Color Vision
Almost all color cells gave a bigger response to a color if it was preceded by an opposite color, suggesting that these cells also encode temporal color contrast, and color perception is likely to be influenced by this encoding. Expand


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