Color correction apparatus for a duplicate camera
AssigneeDainippon Screen Seizo Kabushiki Kaisha
InventorsKoichi Isono, Tsuneo Takagi
Life of this patent
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Abstract
A color correction apparatus for a duplicate camera wherein three color correction filters of three primary colors are provided and are selectively interposed into the exposure light path, is disclosed. An arithmetic unit is connected to a color correction value setup means which sets up color correction values of colors to be removed from an original picture, and it receives these density values as negative values and subtracts the minimum value thereof from each of the other density values to outputs a color correction signal. Then, a control unit connected to the arithmetic unit controls the color correction filters so that they may be interposed into the exposure light path according to the color correction signal.
Claims4
A color correction apparatus for a duplicate camera wherein three color correction filters of three primary colors are provided and are selectively interposed into the exposure light path, comprising:
- (a) color correction value setup means which sets up color correction values of colors to be removed from the tone of an original picture;
- (b) an arithmetic unit which is connected to the color correction value setup means and which inputs the density values set up in the color correction value setup means as negative values and subtracts the minimum value of the density values input from each of the other density values to output a color correction signal corresponding to the differences subtracted of the density values;
- and
- (c) a control unit which is connected to the arithmetic unit and which controls the color correction filters so that they may be interposed into the exposure light path according to the color correction signal.
Dependencies are inferred from the claim text.