Removing camera shake from a single photograph
First Claim
1. A method for deblurring an image comprising the computer implemented steps of:
- providing statistics on distribution of intensity gradients of a known model natural image;
receiving a single input image defining a subject image having blur;
estimating a blur kernel and a solution image portion corresponding to a sample area of the subject image, by applying the statistics to intensity gradients of the sample area and solving for most probable solution image, said estimating resulting in a blur kernel, wherein the model natural image may be unrelated to the subject image; and
deconvoluting the subject image using the resulting blur kernel, the deconvoluting generating a deblurred image corresponding to the subject image.
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Accused Products
Abstract
A computer method and system for deblurring an image is provided. The invention method and system of deblurring employs statistics on distribution of intensity gradients of a known model. The known model is based on a natural image which may be unrelated to the subject image to be deblurred by the system. Given a subject image having blur, the invention method/system estimates a blur kernel and a solution image portion corresponding to a sample area of the subject image, by applying the statistics to intensity gradients of the sample area and solving for most probable solution image. The estimation process is carried out at multiple scales and results in a blur kernel. In a last step, the subject image is deconvolved image using the resulting blur kernel. The deconvolution generates a deblurred image corresponding to the subject image.
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Citations
21 Claims
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1. A method for deblurring an image comprising the computer implemented steps of:
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providing statistics on distribution of intensity gradients of a known model natural image; receiving a single input image defining a subject image having blur; estimating a blur kernel and a solution image portion corresponding to a sample area of the subject image, by applying the statistics to intensity gradients of the sample area and solving for most probable solution image, said estimating resulting in a blur kernel, wherein the model natural image may be unrelated to the subject image; and deconvoluting the subject image using the resulting blur kernel, the deconvoluting generating a deblurred image corresponding to the subject image. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. Computer apparatus for deblurring an image, comprising:
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a set of statistics on distribution of intensity gradients of a model natural image; a preprocessor for receiving a single input image defining a subject image having blur; a motion estimator estimating a blur kernel and a solution image portion corresponding to a sample area of the subject image, by applying the statistics to intensity gradients of the sample area and solving for most probable solution image, said estimating resulting in a blur kernel, wherein the model natural image may be unrelated to the subject image; and a deconvoluter for deconvoluting the subject image using the resulting blur kernel, the deconvoluting generating a deblurred image corresponding to the subject image. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A computer system for deblurring an image, comprising:
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means for providing statistics on distribution of intensity gradients of a known model natural image; means for receiving a single input image defining a subject image having blur; motion estimation means for estimating a blur kernel and a solution image portion corresponding to a sample area of the subject image, by applying the statistics to intensity gradients of the sample area and solving for most probable solution image, said estimating resulting in a blur kernel, wherein the known model natural image may be unrelated to the subject image; and deconvolution means for deconvoluting deconvoluting the subject image using the resulting blur kernel, the deconvoluting generating a deblurred image corresponding to the subject image. - View Dependent Claims (18, 19, 20, 21)
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Specification