| 摘要 |
Apparatus and method for discriminating between regions of text and continuous tone areas of mixed format documents and for selecting print/no-print decisions to be made by either an image processing algorithm optimized for text or an image processing algorithm optimized for continuous tone. A video signal of digital values indicative of pixels representing the image content of the document is applied to a two-level comparator to produce a preliminary text mode or continuous tone mode decision. A continuous tone preliminary decision is changed to a text decision if the pixel of interest is within a predetermined distance of a text pixel.
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