Patent ID: 7407248
Filing Date: 2008-08-05
Classification: B41J,H04N

Abstract:
1. An image processing method which performs processing to generate image data based on input data and output the image data to an image forming device, the image forming device including a printing head in which first nozzles for ejecting color ink drops are arranged in a symmetrical formation to forward and backward scanning directions and second nozzles for ejecting black or gray ink drops are arranged in an unsymmetrical formation with respect to the first nozzles for ejecting color ink drops, and adapted to perform a uni-directional printing or a bidirectional printing with the printing head, the image processing method comprising the steps of: performing a black generation processing to the input data; and delaying, when performing the black generation processing, a black-generation start level for the bidirectional printing to a shadow-side gradation level from a black-generation start level for the uni-directional printing.