| 摘要 |
PROBLEM TO BE SOLVED: To restrain adverse effects in the case of image scene switching by gradation correction, when gradation is changed through gradation correction. SOLUTION: The features of an input signal are detected, the gain of gradation correction is corrected from detected results of the maximum luminance and the minimum luminance, andγcharacteristic are corrected from the luminance distribution. From the detection of input signal feature to the gradation correction, when there time delay appears exists to some extent and in gradation correcting device, the gain of gradation correction is set nearly equal to 1, when it is determined as a switchover of a scene.
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