IMAGE PROCESSING DEVICE, IMAGE PROCESSING METHOD, AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To materiarize image processing at low cost which can prepare hard-to-forge printed material. SOLUTION: In an image processing device 1, an applying position of a screen cell for an input image in calculating portions 5 and 6 of a screen processor 3 is shifted to at least one direction of a main scanning direction or a sub scanning direction of the input image, and a shift amount is changed according to the applying position. In a calculating portion 7, an output value Out after screen processing for a pixel value IT of the input image is calculated by the shifted screen cell to be outputted to the outside. COPYRIGHT: (C)2007,JPO&INPIT