Detection of highlighted regions
First Claim
Patent Images
1. A method of copying a document, said document comprising first colored regions and second text regions comprising the steps of:
- a) identifying a location of said colored regions, said step of identifying further comprising the steps of;
i) inputting a grayscale image of said document;
ii) bandpass thresholding said grayscale image of said document to produce a first intermediate image;
iii) opening said first intermediate image to produce a second intermediate image; and
iv) growing said second intermediate image into a mask to produce a color region image; and
b) copying said color region image in a first format and remaining portions in a second format.
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Abstract
A method and apparatus for detection of highlighted regions of a document. A document containing highlighted regions is scanned using a gray scale scanner. Morphology and threshold reduction techniques are used to separate highlighted and non-highlighted portions of the document. Having separated the highlighted and non-highlighted portions, optical character recognition (OCR) techniques can then be used to extract text from the highlighted regions.
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Citations
8 Claims
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1. A method of copying a document, said document comprising first colored regions and second text regions comprising the steps of:
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a) identifying a location of said colored regions, said step of identifying further comprising the steps of; i) inputting a grayscale image of said document; ii) bandpass thresholding said grayscale image of said document to produce a first intermediate image; iii) opening said first intermediate image to produce a second intermediate image; and iv) growing said second intermediate image into a mask to produce a color region image; and b) copying said color region image in a first format and remaining portions in a second format. - View Dependent Claims (2)
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3. Apparatus color copier for copying a document, said document comprising first colored regions and second text regions comprising the steps of:
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a) means for identifying a location of said colored regions, said means for identifying programmed to; i) input a grayscale image of said document; ii) bandpass threshold said grayscale image of said document to produce a first intermediate image; iii) open said first intermediate image to produce a second intermediate image; and iv) grow said second intermediate image into a mask to produce a color region image; and b) means for copying text in said color region image in a first color and remaining text in a second color or black.
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4. A monochrome copier for copying a document comprising first colored regions and second monochrome regions comprising:
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a) means for identifying a location of said colored regions, said means for identifying programmed to; i) input a grayscale image of said document; ii) bandpass threshold said grayscale image of said document to produce a first intermediate image; and iii) use said intermediate image to produce a color region mask to identify said color region; and b) means for printing at least a portion of said document identified by said mask in a first format and remaining portions in a second format. - View Dependent Claims (5, 6, 7, 8)
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Specification