| 摘要 |
A final-correction-value acquisition unit performs, for each frame, reduction processing for reducing a difference in gamma correction value between frames and thereby acquires a final correction value of the frame. The final-correction-value acquisition unit determines into which type an observed frame is classified among a first-, a second- and a third-type frames, and controls a level of the reduction processing on the observed frame according to a determined type of the observed frame, the first-type frame being a frame having a change amount obtained from a change-amount calculator equal to or smaller than a predetermined threshold, the second-type frame being a frame having a change amount larger than the threshold and at least one frame having a change amount larger than the threshold exists within a preceding predetermined period immediately before the observed frame, the third-type frame being a frame other than the first- and second-type frames. |
