Patent ID: 9396527
Filing Date: 2016-07-19
CPC Classification: G06K,G06T,H04N

Claim Text:
1. An image processing device comprising: region pixel count calculating means for calculating, in image data having a first number of gradations, a number of pixels having luminance within a region, for each region obtained by dividing the range of luminance in the image data into a plurality of regions; region selecting means for selecting a region from the plurality of regions based on the number of pixels having luminance within the region; and gradation setting means for setting the luminance of the pixels having luminance within the region selected by the region selecting means to be within a second number of gradations that is less than the first number of gradations, and setting the luminance of pixels having luminance within a region that has not been selected by the region selecting means to a minimum value or a maximum value, wherein the region selecting means selects a region of which the ratio of the number of pixels having luminance within the region to the number of pixels of all regions is a predetermined threshold or higher.