Enhancing text-like edges in digital images
First Claim
Patent Images
1. A method of enhancing text-like edges in an image of pixels, comprising the steps of:
- segmenting pixels in a block of image pixels into first and second pixel classes; and
edge enhancing the pixel block in response to a determination that the pixel block likely contains at least one text-like edge based on a measure of distance separating intensity values respectively representing intensity distributions of the first and second classes and based on measures of peakedness of intensity histograms computed for both the first and second pixel classes.
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Abstract
Systems and methods of enhancing text-like edges in digital images are described. In one aspect, pixels in a block of image pixels are segmented into first and second pixel classes. The pixel block is edge enhanced in response to a determination that the pixel block likely contains at least one text-like edge based on a measure of distance separating intensity values respectively representing intensity distributions of the first and second classes and based on measures of peakedness of intensity histograms computed for both the first and second pixel classes.
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Citations
27 Claims
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1. A method of enhancing text-like edges in an image of pixels, comprising the steps of:
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segmenting pixels in a block of image pixels into first and second pixel classes; and edge enhancing the pixel block in response to a determination that the pixel block likely contains at least one text-like edge based on a measure of distance separating intensity values respectively representing intensity distributions of the first and second classes and based on measures of peakedness of intensity histograms computed for both the first and second pixel classes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A system of enhancing text-like edges in an image of pixels, comprising an image enhancement engine operable to:
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segment pixels in a block of image pixels into first and second pixel classes; and edge enhance the pixel block in response to a determination that the pixel block likely contains at least one text-like edge based on a measure of distance separating intensity values respectively representing intensity distributions of the first and second classes and based on measures of peakedness of intensity histograms computed for both the first and second pixel classes. - View Dependent Claims (22, 23, 24, 25, 26)
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27. A computer readable medium storing computer readable instructions causing a machine to perform operations comprising:
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segmenting pixels in a block of image pixels into first and second pixel classes; and edge enhancing the pixel block in response to a determination that the pixel block likely contains at least one text-like edge based on a measure of distance separating intensity values respectively representing intensity distributions of the first and second classes and based on measures of peakedness of intensity histograms computed for both the first and second pixel classes.
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Specification