Patent ID: 7092124
Filing Date: 2006-08-15
Classification: H04N

Abstract:
1. An image processing apparatus, comprising: an acquisition unit for acquiring image data that includes a plurality of pixels, each of which is set as a target pixel to be judged; an isolated pixel judgment unit for judging, based on the image data, whether the target pixel is an isolated pixel for a judgment of a halftone-dot area; an isolated pixel counter for counting a number of isolated pixels in a predetermined area; and a halftone-dot area judgment unit for judging whether the target pixel is in a halftone-dot area, by comparing the count number of isolated pixels with a predetermined threshold, wherein the isolated pixel judgment unit includes: a first judgment subunit for judging whether the target pixel is an isolated pixel for a judgment of a halftone-dot area whose dot size is within a first range; and a second judgment subunit for judging whether the target pixel is an isolated pixel for a judgment of a halftone-dot area whose dot size is within a second range, and the isolated pixel judgment unit judges that the target pixel is an isolated pixel, when a judgment result of at least one of the first judgment subunit and the second judgment subunit is affirmative.