Image analysis – Image segmentation – Distinguishing text from other regions
Patent
1997-05-12
1999-11-30
Johns, Andrew W.
Image analysis
Image segmentation
Distinguishing text from other regions
382269, 358462, G06K 954
Patent
active
059956585
ABSTRACT:
An image processing device converting a binary image into multi-valued output image includes an image-area-separation processing unit detecting shadow areas in the binary image, wherein the shadow areas are graphic or photographic image areas having a number of lines greater than a predetermined number, an outline-correction processing unit correcting jagged edges in the binary image to generate a corrected image, an multi-value processing unit converting the binary image into a multi-valued image through a filtering process, and a selection unit selecting the multi-valued image for the shadow areas and the corrected image for areas other than the shadow areas so as to generate the multi-valued output image.
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Johns Andrew W.
Ricoh & Company, Ltd.
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