Method for extracting features of irises in images using difference of sum filters
First Claim
Patent Images
1. A method for extracting features of an iris in an image, comprising:
- detecting boundaries of an iris in an image;
mapping pixels representing the iris in the image to a rectangular image, according to the boundaries;
filtering the pixels in the rectangular image to produce filtered output, in which the filtering uses difference of sum filters;
binarizing the filtered output to produce a feature vector representing the iris.
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Abstract
A method for extracting features of an iris in an image is described. An unwrapped iris image is converted to an integral image by summations of pixel intensities. A novel bank of difference of sum filters is used to filter the integral image. The filtered output is binarized to produce an iris feature vector. The iris feature vector is used for iris matching.
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Citations
4 Claims
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1. A method for extracting features of an iris in an image, comprising:
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detecting boundaries of an iris in an image;
mapping pixels representing the iris in the image to a rectangular image, according to the boundaries;
filtering the pixels in the rectangular image to produce filtered output, in which the filtering uses difference of sum filters;
binarizing the filtered output to produce a feature vector representing the iris. - View Dependent Claims (2, 3, 4)
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Specification