To enable optimal reproduction of a compound document containing both text and halftones, it is necessary to identify the halftone regions of the document and process them separately from the text and line arts portion. A technique for halftone detection using the auto correlation of the video stream has been improved to reduce the false classification of small kanji and to enable detection of non-45-degree screens. Typical examples of the detection map and the processed images are presented.


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    Title :

    Improved halftone detection method in digital document reproduction


    Contributors:

    Conference:

    Color Hard Copy and Graphic Arts III ; 1994 ; San Jose,CA,United States


    Published in:

    Publication date :

    1994-05-09





    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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