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|1. (WO2018043575) IMAGE PROCESSING DEVICE, IMAGE PROCESSING METHOD AND PROGRAM|
|Applicants:||CANON KABUSHIKI KAISHA
|Title:||IMAGE PROCESSING DEVICE, IMAGE PROCESSING METHOD AND PROGRAM|
The present invention makes it possible to leave necessary signals on a difference image and to reduce noise. An image processing device comprises: a search area size calculation means for calculating a search area size on the basis of a pixel size of a first image and/or a second image; a position acquisition means for acquiring a position of interest on the first image, and a corresponding position corresponding to the position of interest on the second image; a search area setting means for setting a search area of the search area size around the corresponding position on the second image; and a difference means for determining a difference value corresponding to the position of interest on the basis of a density value at the position of interest on the first image, and density values at a plurality of positions within the search area on the second image.