公开(公告)号：EP2801188A4

公开(公告)日：2015-08-12

申请号：EP13733908

申请日：2013-01-04

申请人： RICOH CO LTD

发明人： HARA TAKAYUKI ,  YOSHIDA KASUHIRO ,  WATANABE YOSHIKAZU ,  KATAOKA AKIRA

IPC分类号： H04N1/409 ,  G06T5/00 ,  H04N5/232 ,  H04N5/357 ,  H04N101/00

CPC分类号： H04N5/357 ,  G06T5/002 ,  G06T2207/20012 ,  G06T2207/20016 ,  G06T2207/20192 ,  H04N1/409 ,  H04N5/2173 ,  H04N5/361 ,  H04N9/045

摘要： An image processing apparatus includes a decimating unit configured to decimate pixels in a target image to obtain a decimated image containing a smaller number of pixels than the target image; an extracting unit configured to extract similar pixels at each of which a similarity to a pixel of interest is a threshold or more, from a region containing the pixel of interest among pixels of the decimated image; a first calculating unit configured to calculate a correction candidate value based on pixel values of the similar pixels; a second calculating unit configured to calculate a correction candidate value for each decimated pixel, based on the correction candidate value calculated for each pixel of the decimated image; and a correcting unit configured to correct a target pixel value of a target pixel in the target image, based on the correction candidate value calculated by the first or second calculating unit.