| 摘要 |
PROBLEM TO BE SOLVED: To provide a signal processing apparatus capable of achieving more excellent image quality by preventing color saturation effectively relative to a signal processing apparatus that takes into account only a luminance signal. SOLUTION: The signal processing apparatus 1, which inputs a luminance signal Y and color difference signals Cr, Cb of one video image and changes a signal level of the color difference signals Cr, Cb based on the inputted luminance signal Y, comprises: a saturation converter 11 for converting the inputted color difference signal Cr, Cb into a saturation signal S; a luminance/saturation histogram generator 12 for generating a two-dimensional frequency distribution of saturation and luminance based on the luminance signal Y and the color difference signals Cr, Cb; and a color gain calculator 13 for calculating a color gain based on the two-dimensional frequency distribution of luminance and saturation. COPYRIGHT: (C)2010,JPO&INPIT
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