COLOR IS HUMAN JUDGMENT
- Color is a human condition.
- We defined how we see color based on the red, green, blue cone cell responses and how the color computer relates these responses to a color measurement using X, Y, Z calculations.
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- The judgment of the colors that we see is not the same as the data in the color computer or the response of the vision system. - The vision response signals move to the ganglion cells which are in the retinal membrane, then along the optic nerve to the visual cortex (brain). In this process the cone and rod cell responses are manipulated to send color vision sensations to the brain. |
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| - The vision sensations that are sent to the brain create the three dimensions of color judgment response that is often referred to as three-dimensional color space. The dimensions are light to dark (L); reddish to greenish (a); yellowish to bluish
(b).
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- There are several descriptors to the visual sensation that are important to understand: - brightness: the attribute of a visual sensation according to which a sample appears to exhibit more or less lightness. - hue: the color of a sample relating to primary colors such as red, yellow, green, blue or its absolute color. This becomes hard to define in terms of complex mixtures of color such as browns or purple. In terms of color difference, any color can change in hue and be defined in these terms. - Chroma: the colorfulness of a sample relating the saturation relative of the range from a pure hue to a neutral color having no hue (lying along the gray scale from white to black. |
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| <COLOR IS HUMAN JUDGMENT> |
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