Method and apparatus for tone correction of a digital color imag

Computer graphics processing and selective visual display system – Display peripheral interface input device

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345147, G09G 504

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057741123

ABSTRACT:
Midtone correction of RGB pixel values is provided, without changes in chromaticity, by multiplying each color component of a linear RGB representation by a single value. The single value corresponds to an adjustment of the original luminance of the pixel, resulting in no change to the chromaticity of the pixel.

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