发明名称 |
Image processing apparatus and control method thereof |
摘要 |
A brightness control unit includes: a “feedback brightness control unit” that calculates a first gain from a corrected image data and multiplies the first gain by image data prior to correct; and a “feedforward brightness control unit” which, when a scene change is detected, calculates a second gain on the basis of a difference between the first gain which is calculated from the corrected image data and the first gain which has been multiplied by the pre-correction image data of the corrected image data in order to correct the difference, and multiplies the second gain by the corrected image data. |
申请公布号 |
US8797347(B2) |
申请公布日期 |
2014.08.05 |
申请号 |
US201113154749 |
申请日期 |
2011.06.07 |
申请人 |
Canon Kabushiki Kaisha |
发明人 |
Miyachi Norihiko;Sagano Osamu;Mori Makiko |
分类号 |
G09G5/00 |
主分类号 |
G09G5/00 |
代理机构 |
Fitzpatrick, Cella, Harper & Scinto |
代理人 |
Fitzpatrick, Cella, Harper & Scinto |
主权项 |
1. An image processing apparatus that inputs video image data of a plurality of frames and displays a plurality of images comprising a plurality of frames based on the video image data on a display unit, the image processing apparatus comprising:
a correction unit that corrects image data for each frame of the plurality of frames with a correction amount corresponding to a value of the image data, and that outputs corrected image data for each frame; a brightness control unit that controls an overall brightness of image data for each frame of the plurality of frames; and a detection unit that detects a scene change between one of the images and the next image in the plurality of images comprising the plurality of frames, wherein the brightness control unit includes: (a) a first brightness control unit that calculates a first gain from the corrected image data of a frame and multiplies the first gain by image data of a following frame prior to input into the correction unit; and (b) a second brightness control unit which, when a scene change is detected by the detection unit, calculates a second gain on the basis of a difference between (i) the first gain which is calculated from the corrected image data of a current frame and (ii) the first gain which has been calculated from the corrected image data of a preceding frame, and multiplies the second gain by the corrected image data of the current frame, and which, when a scene change is not detected by the detection unit, multiplies a gain of 1 by the corrected image data of the current frame or bypasses the multiplication of the second gain. |
地址 |
Tokyo JP |