Patent ID: 6603575
Filing Date: 2003-08-05
Classification: H04N

Abstract:
A method for processing image data, comprising:receiving a pixel of image data having a first resolution; converting the received pixel of image data to a plurality of subpixels, the plurality of subpixels representing a second resolution, the second resolution being higher than the first resolution; thresholding the plurality of subpixels to generate a group of subpixels for each pixel and a threshold error value for each pixel; determining if the group of subpixel values from the thresholding process produces an undesirable pattern; modifying the group of subpixel values to eliminate the undesirable pattern when determining if the group of subpixel values from the thresholding process produces an undesirable pattern includes making a positive determination; generating a plurality of modification subpixel error values based on results of modifying the group of subpixel values; and compensating the threshold error values for pixels in adjacent pixels based on the modification subpixel error values generated in said step in conjunction with a set of weighting coefficients.