Patent ID: 7446903
Filing Date: 2008-11-04
Classification: H04N

Abstract:
1. An image processing device, comprising: an image characteristic identifying portion receiving input data indicative of all pixels within the image and identifying characteristics of the image; an inputting portion receiving input data indicative of one pixel within an image; a correction amount setting portion setting a correction amount based on an error value determined for at least one adjacent pixel that has been already-processed and that is located near to a subject pixel, the correction amount setting portion setting the correction amount by collecting a portion of the error value for the at least one adjacent pixel by using a distribution matrix; a correction amount adjusting portion adjusting the correction amount by multiplying the correction amount by an error utilization factor to obtain an adjusted correction amount; a correcting portion correcting the input data indicative of one pixel by the adjusted correction amount, thereby converting the input data indicative of one pixel into corrected data; and a converting portion performing a conversion process to convert the corrected data into an output data while calculating an error value obtained through the conversion process for the subject pixel, wherein the image characteristic identifying portion includes: a density range determining portion determining a density range where a false contour will possibly be generated; and a ratio determining portion determining a ratio of the number of pixels, whose densities are within the density range, with respect to a total number of pixels in the image.