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Unformatted text preview: e perceived color is what is not absorbed
• CMY based on subtractive primaries:
cyan (C), magenta (M), and yellow (Y) CMYK Model
• Problem with CMY model:
– Because of imperfect primaries, can’t entirely
absorb all colored light (i.e., make black)
– Usually produces a dark greyish brown • Solution: add black (K) as a fourth primary
• CMYK most common model for printers Luminance and Chromaticity Luminance
• Technically, • RGB and CMYK aren’t the most intuitive
model of colors.
• Artists usually think of dark/light and color
as two different things: – Luminance = incoming light
– Brightness = perceived incoming light • Many color models make the luminance or brightness an
explicit component of the color model though by varying
– – Luminance (brightness)
– Chromaticity (color) Luminance
Value Chromaticity Tints and Shades • Requires two parameters • Lightening or darkening colors: – Usually:
• Saturation – Tint: adding more white to a color
– Shade: adding more black to a color The dominant wavelengt...
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This document was uploaded on 03/15/2012.
- Fall '09
- Image processing