Patent ID: 8824018

Claim:
An image processing apparatus, comprising: a region discrimination section for discriminating regions to which respective pixels of input image data belong so as to determine at least a text region; a spatial filter process section for carrying out a spatial filter process with respect to the input image data in accordance with a result discriminated by the region discrimination section; an output tone correction section for carrying out a tone correction process with respect to the input image data in accordance with the result discriminated by the region discrimination section; and a mode setting section for enabling a line noise suppression mode in which a line noise image which does not exist in a document image of the input image data but exists in the input image data is suppressed, wherein, in a case where the line noise suppression mode is enabled by the mode setting section: the spatial filter process section carries out the spatial filter process with respect to a text pixel which has been determined to be included in a text region by the region discrimination section, in which in the spatial filter process, an edge enhancement degree of an image is smaller than that obtained when the line noise suppression mode is disabled, and the output tone correction section carries out the tone correction process with respect to the text pixel which has been subjected to the spatial filter process, in which in the tone correction process, a contrast enhancement degree of an image is higher than that obtained when the line noise suppression mode is disabled.