Patent ID: 9218552
Filing Date: 2015-12-22
Classification: G03G,G06K,H04N

Abstract:
1. An image processing apparatus that obtains output image data by processing input image data, comprising: a density adjustment level input unit capable of inputting an adjustment level for adjusting density in a designated output density range of a plurality of predetermined density ranges in the output image data; a density adjustment unit that adjusts density of the input image data according to the input adjustment level, a gradation conversion unit that applies gradation conversion of different gradation characteristics for different object types included in the input image data to generate the output image data; a calculation unit that calculates an input density range in the input image data corresponding to the designated output density range by converting the designated output density ranges using a reverse conversion of the gradation conversion for a designated type of object, the reverse conversion being a conversion for obtaining the input image data from the output image data generated by applying the gradation conversion to the input image data; and a generation unit that generates an adjustment table in correspondence with each object type so that density in the input density range calculated by the calculation unit are adjusted using the adjustment table according to the adjustment level input by the density adjustment level input unit, wherein the density adjustment unit adjusts density of the input image data using the adjustment table generated by the generation unit, and the gradation conversion unit derives the output image data by applying gradation conversion to the image data whose density has been adjusted by the density adjustment unit.