| 摘要 |
a key input part having a key input terminal for overlapping the predetermined color signal onto the object color signal and controlling the saturation level of the predetermined color signal; a color signal generating part for generating the predetermined color signal by the output signal of the key input part; a saturation level controlling part for controlling the saturation level of the predetermined color signal; and a color overlapping part for overlapping the predetermined color signal output and the object color singal output.
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