Method of and apparatus for generating colour matte signals

Details Method of and apparatus for generating colour matte signals Method of and apparatus for generating colour matte signals

H - Electricity

04

N

350/44

H04N 9/74 (2006.01) H04N 9/76 (2006.01)

Patent

CA 1234909

PHB. 33.072. ABSTRACT: A method of generating colour matte signals com- prises the steps of: inputting hue, saturation, and luminance values; calculating R, G and B colour component values from the hue, saturation and luminance values; calculating luminance (Y), and colour difference component (Cr and Cb) values from the calculated R, G and B values; and outputting the calculated Y, Cr, and Cb values. The hue value in two parts, the first of which defines one of six segments formed by dividing each side of the colour triangle in half and the second of which define intermediate values within the segment. The R, G and B values are determined by calculating three colour components from the saturation, luminance and the second part of the hue value, and assigning the three colour components to registers for holding R, G and B values in dependence on the segment defined by the first of the hue value. An apparatus for carrying out the method is also described.

480107

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