Edge enhancement which reduces the visibility of false contours
First Claim
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1. A method of edge enhancing a digital image having pixels which reduces the visibility of false edge contours, comprising the steps of:
- a) acquiring a digital image;
b) computing an edge boost record having positive and negative boost values for different portions of the edge regions in a digital image;
c) modifying the edge boost record by applying an adaptive blur kernel to the pixels of said edge boost record by;
(i) providing the blur kernel in response to the boost values of a predetermined number of pixels near the pixel of interest; and
(ii) using the geometric pattern of positive and negative boost values in constructing the blur kernel so that only non-negative boost values are used to modify a non-negative boost value, and only non-positive boost values are used to modify a non-negative boost value; and
d) applying the modified edge boost record to the digital image to provide an edge enhanced digital image which reduces the visibility of false edge contours.
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Abstract
A method of edge enhancing a digital image having pixels which reduces the visibility of false edge contours and includes acquiring a digital image; computing an edge boost record having positive and negative boost values for different portions of the edge regions in a digital image; modifying the edge boost record by applying an adaptive blur kernel to the pixels of such edge boost record; and applying the modified edge boost record to the digital image to provide an edge enhanced digital image which reduces the visibility of false edge contours.
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Citations
5 Claims
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1. A method of edge enhancing a digital image having pixels which reduces the visibility of false edge contours, comprising the steps of:
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a) acquiring a digital image;
b) computing an edge boost record having positive and negative boost values for different portions of the edge regions in a digital image;
c) modifying the edge boost record by applying an adaptive blur kernel to the pixels of said edge boost record by;
(i) providing the blur kernel in response to the boost values of a predetermined number of pixels near the pixel of interest; and
(ii) using the geometric pattern of positive and negative boost values in constructing the blur kernel so that only non-negative boost values are used to modify a non-negative boost value, and only non-positive boost values are used to modify a non-negative boost value; and
d) applying the modified edge boost record to the digital image to provide an edge enhanced digital image which reduces the visibility of false edge contours. - View Dependent Claims (2, 3, 4)
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5. A computer program product for edge enhancement of a digital image having pixels, comprising a computer readable storage medium having a computer program stored thereon for performing the steps of:
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a) acquiring a digital image;
b) computing an edge boost record having positive and negative boost values for different portions of the edge regions in a digital image;
c) modifying the edge boost record by applying an adaptive blur kernel to the pixels of said edge boost record by;
(i) providing the blur kernel in response to the boost values of a predetermined number of pixels near the pixel of interest; and
(ii) using the geometric pattern of positive and negative boost values in constructing the blur kernel so that only non-negative boost values are used to modify a non-negative boost value, and only non-positive boost values are used to modify a non-negative boost value; and
d) applying the modified edge boost record to the digital image to provide an edge enhanced digital image.
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Specification