METHOD AND APPARATUS FOR SINGLE-IMAGE-BASED RAIN STREAK REMOVAL
First Claim
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1. A single-image-based rain streak removal method, comprising:
- decomposing an original image into an original high frequency image and an original low frequency image;
obtaining a dictionary, wherein the dictionary is the best for representing a plurality of patches of a reference image and the dictionary comprises a rain sub-dictionary and a non-rain sub-dictionary;
finding a coefficient of each patch of a plurality of patches of the original high frequency image corresponding to the dictionary according to a first cost function and a prerequisite;
producing a non-rain high frequency image using the dictionary and the coefficient of each of the patches of the original high frequency image; and
combining the original low frequency image and the non-rain high frequency image into a non-rain image.
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Abstract
A method and an apparatus for single-image-based rain streak removal are introduced herein. In this method and apparatus, an original image is decomposed into a high frequency part and a low frequency part, and the high frequency image is then decomposed into a rain part and a non-rain part. The non-rain high frequency image and the original low frequency image are used to produce a non-rain image.
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18 Claims
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1. A single-image-based rain streak removal method, comprising:
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decomposing an original image into an original high frequency image and an original low frequency image; obtaining a dictionary, wherein the dictionary is the best for representing a plurality of patches of a reference image and the dictionary comprises a rain sub-dictionary and a non-rain sub-dictionary; finding a coefficient of each patch of a plurality of patches of the original high frequency image corresponding to the dictionary according to a first cost function and a prerequisite; producing a non-rain high frequency image using the dictionary and the coefficient of each of the patches of the original high frequency image; and combining the original low frequency image and the non-rain high frequency image into a non-rain image. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A single-image-based rain streak removal apparatus, comprising:
a processor, receiving an original image, decomposing the original image into an original high frequency image and an original low frequency image, and obtaining a dictionary, wherein the dictionary is the best for representing a plurality of patches of a reference image and the dictionary comprises a rain sub-dictionary and a non-rain sub-dictionary, the processor finds a coefficient of each of the patches of the original high frequency image corresponding to the dictionary according to a first cost function and a prerequisite, produces a non-rain high frequency image using the dictionary and the coefficient of each of the patches of the original high frequency image, and combines the original low frequency image and the non-rain high frequency image into a non-rain image. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
Specification