Download A field guide to digital color by Maureen Stone PDF

By Maureen Stone

Annotation Maureen Stone's box consultant 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 knowing colour and its functions, discusses colour media and colour administration and using colour in special effects, together with colour layout and choice. The e-book offers a advisor for somebody who desires to  Read more...

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The difference Figure 13. in appearance is entirely due to the difference in spatial frequency. The colors in the two patterns are identical. Only the spatial frequency is different, which changes their appearance. 33 A Field Guide to Digital Color Adaptation Human vision is very adaptable. We are capable of seeing in both very dim and very bright light, and over six orders of magnitude from the dimmest starlight to full sunlight. When we move from bright to dim lighting, or vice versa, we can feel our visual system adapt.

Figure 10. The same gray square on four different backgrounds, showing the effect of simultaneous contrast. It should look lighter on the black background than the white one; greenish on the red back ground; and reddish on the green one. Figure 11. ” Spatial Phenomena Trichromatic theory applies to colors in isolation. Samples to be compared must be a similar size, and viewed on a neutral background. Many color appearance phenomena are caused by the interaction between colors. Absolute size matters also, which is why the paint chip is always less vivid than the painted wall.

The other corners of the cube are the primary colors (red, green, and blue) and the pairwise sums of the primaries, sometimes called the secondary colors (cyan, magenta, and yellow). These colors and their color values are shown in Figure 1. Mathematically, colors can fall outside of the unit cube sim(0,1,1) (1,1,1) ply by including values greater than (1,0,1) (0,0,1) 1 or less than 0. Most applications that use RGB color spaces restrict (0,1,0) the values to the range (0, 1). The (1,1,0) unit cube, therefore, is the gamut (1,0,0) (0,0,0) of colors defined for that color space.

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