| 摘要 |
A gray scale conversion table memory stores data obtained by normalizing a luminance cumulative histogram, and when receiving an input luminance value as an address, outputs gray scale conversion luminance data obtained by gray scale conversion (flattening of a luminance distribution, etc.). A frequency component correction circuit increases a higher frequency component of a luminance portion having a small slope in the normalized cumulative histogram. Thereby, a reduction in sharpness or the like is suppressed in a luminance portion to which a less number of gray scales are assigned.
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