A field guide to digital color by Maureen Stone

By Maureen Stone

Annotation Maureen Stone's box advisor to electronic colour offers a survey of electronic colour with specified emphasis on these fields vital for special effects. The ebook presents the root for realizing colour and its purposes, discusses colour media and colour administration and using colour in special effects, together with colour layout and choice. The booklet presents a advisor for somebody who wishes to  Read more...

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Figure 3 is a photograph of a set of Munsell color chips displayed on a Munsell Color Tree, which nicely illustrates the shape and organization of the Munsell color-order system. The Color Tree consists of a number of chroma-value slices through the color space. Each slice shows all the chips of a specific hue with value increasing vertically and chroma radially. Different hues have different sets of colors visible on the slice, showing the extent of the color space, which is bounded by the original specification.

Summary Light in the visible spectrum stimulates the cones in the retina, which encode and send messages along the optic nerve to produce the sensation of color. Different spectra can produce the same response, which is the property called metamerism. The encoding can be represented by three numbers because the human visual system is basi- 18 1 Color Vision cally trichromatic (three-colored). The principle of trichromacy is fundamental to color measurement and color reproduction. Color measurement uses these properties to create representations of color that can be encoded by instruments.

The visual system is designed to view objects in a world of ever-changing light and shadow. When colors are associated with objects, their appearance becomes influenced by our experience in the world, adding cognitive effects to the perceptual effects of color appearance. Color appearance models try to capture this complexity and apply it to applications such as digital imaging. The simplest color appearance models are the color difference spaces, such as CIELAB. These organize color perceptually, modeling adaptation (but not very accurately) by including a reference white.

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