Device for correcting colour information supplied by a...

Details Device for correcting colour information supplied by a... Device for correcting colour information supplied by a...

H - Electricity

04

N

350/42

H04N 9/04 (2006.01) H04N 9/09 (2006.01) H04N 9/77 (2006.01)

Patent

CA 1197608

ABSTRACT OF THE DISCLOSURE The correction consists in correcting the overall luminance, whilst retaining the original chromaticity of the analysed picture. For this purpose, the device according to the invention comprises a correcting circuit receiving the colour signals Ve1, Ve2 and Ve3 and supplying corrected colour signals, a matrixing circuit supplying the overall luminance signal Ve, and a control circuit calculating eight transfer parameters defining the transfer function F, which transforms the signal Ve into a signal F(Ve) covering the scale of luminances in accordance with an equal distribution in order to satisfy the optimum vision conditions. The control circuit processes the signal Image and the correcting circuit supplies corrected colour signals respectively corresponding to the products Ve1 ? Image , Ve2 ? Image and Ve3 ? Image ?

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