Importance

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Abstract

An apparatus to judge, on the basis of image data indicative of the densities of individual pixels in a document original image, whether or not a judgment area in the document original image is a dot area. The apparatus includes: a dot candidate pixel detecting section for detecting a dot candidate pixel on the basis of image data for a plurality of lines; an extension processing section for extensively applying a dot candidate pixel detection result for an object line to lines adjacent to the object line; and a dot area judging section for judging, on the basis of the distribution of dot candidate pixels within a judgment base area, that a judgment area having a predetermined positional relationship with the judgment base area is a dot area.

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First Claim