Apparatus for and method of detecting dotted image area using two types of judging areas

摘要

An apparatus for and a method of detecting a dotted image area in an image. It is judged on the basis of image data corresponding to pixels in a first judging area which includes a predetermined number of pixels including a target pixel whether or not the target pixel is a peculiar point pixel (a peak pixel or a dip pixel). Further, it is judged on the basis of image data corresponding to pixels in a second judging area which is larger than the first judging area whether or not the target pixel is a peculiar point pixel. The dotted image area in the image is detected on the basis of the results of judgment related to the first judging area and the second judging area. <IMAGE>