US Patent 7676090 Systems and methods for content-based document image enhancement
Patent 7676090 was granted and assigned to Lexmark International, Inc. on March, 2010 by the United States Patent and Trademark Office.
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A system can include a system processor that is programmed or adapted to classify pixels in a document image, and in some instances, to enhance the document image based upon such classification. Image data including pixels is received. For each pixel in some subset of the image data, a feature vector is generated. Each pixel in the subset is classified as text or image based upon its associated feature vector. The classifications can be outputted for storage and/or further processing. Further processing can include pixel level enhancement processing. Such enhancement processing can include application of a sharpening filter to pixels classified as text and of a smoothing filter to pixels classified as image. In some instances, background suppression can be performed upon a subset of the image data prior to classification.
US Patent 07676090 Systems and methods for content-based document image enhancement US Patent 7676090 Systems and methods for content-based document image enhancement
US Patent 07676090 Systems and methods for content-based document image enhancement
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