Patent ID: 7079699
Filing Date: 2006-07-18
Classification: H04N

Abstract:
1. A multi-valued image conversion device for converting an N-valued (N≧3) image composed of a group of pixels, each pixel capable of taking N values, into an M-valued (N>M≧2) image composed of a group of pixels, each pixel capable of taking M values, said device comprising: pixel conversion means for adding an error when neighboring pixels in the neighborhood of a subject pixel are converted into M-valued (N>M≧2) pixels while the subject pixel, which is a conversion target within said N-valued image, is scanned, to the value of said subject pixel at a predetermined ratio and for converting said subject pixel into M-valued pixels on the basis of the added value, wherein said pixel conversion means further converts said subject pixel into an M-valued pixel on the basis of the values of said neighboring pixels after conversion.