Patent ID: 6204934
Filing Date: 2001-03-20
Classification: H04N

Abstract:
An image processing device which converts a color image into a binary image using a dither pattern, the color image consisting of a plurality of areas, the image processing device comprising:dither pattern supply means for providing a plurality of dither patterns if lightness of a first area in the color image is equal to that of a second area adjacent to the first area;first selection means for selecting a first dither pattern from the plurality of dither patterns based on saturation and/or hue of the first area;second selection means for selecting a second dither pattern from the plurality of dither patterns based on saturation and/or hue of the second area;first conversion means for performing binary conversion to the first area using the first dither pattern; andsecond conversion means for performing binary conversion to the second area using the second dither pattern.