Perturbation method for restoring blurred images

A technology of perturbation and blurred images, applied in the field of image processing, can solve problems such as unsatisfactory restoration effect, blurred restored image, poor deblurring effect, etc., and achieve the effect of eliminating boundary effects, simple algorithm, and convenient processing

Inactive Publication Date: 2012-10-03
贵州时空设计有限公司
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Problems solved by technology

There are two situations in the frequency domain method that may make the restoration effect unsatisfactory: one situation is because the frequency domain transformation assumes that f is a periodically repeated image, and there will be a certain discrepancy with the actual situation in the boundary area, which will have a certain impact on the final result. Error, when the size of h is close to the size of g, the deblurring effect is poor; the second case is th...

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  • Perturbation method for restoring blurred images
  • Perturbation method for restoring blurred images
  • Perturbation method for restoring blurred images

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Embodiment 1

[0033] Embodiment 1 of the present invention: the method for restoring the blurred image by the perturbation method, selecting such as figure 2 For the blurred image shown, the blurred image to be restored is estimated using the existing fuzzy parameter estimation method to estimate its blur model and blur parameters, and a degraded function h is constructed; Value; the priority queue P that defines the amount of error improvement (required to be the largest heap), and the initial value is empty. The queue element is a two-tuple composed of coordinates and error improvement amount; define the queue to be disturbed N, the initial value is all matrix values; enter the iteration, first perturb each pixel of the image c with a perturbation trace d, and calculate each pixel. The error improvement amount e generated by the disturbance is inserted into the priority queue P for the point that is not in the priority queue P. If the point is already in the priority queue P, according t...

Embodiment 2

[0035] Embodiment 2 of the present invention: the method for restoring the blurred image by the perturbation method, selecting such as Figure 9For the blurred image shown, the blurred image to be restored is estimated by the existing fuzzy parameter estimation method to estimate its blur model and blur parameters, and a degraded function h is constructed; Each matrix value; the priority queue P that defines the amount of error improvement (required to be a maximum heap), and the initial value is empty. The queue element is a two-tuple composed of coordinates and error improvement amount; define the queue to be disturbed N, the initial value is all matrix values; enter the iteration, first perturb each pixel of the image c with a perturbation trace d, and calculate each pixel. The error improvement amount e generated by the disturbance is inserted into the priority queue P for the point that is not in the priority queue P. If the point is already in the priority queue P, accor...

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Abstract

The invention discloses a perturbation method for restoring blurred images. The perturbation method for restoring the blurred images includes the steps: estimating a blurring model and blurring parameters of a to-be-restored blurred image by means of an existing blurring parameter estimation method, and constructing a blurring function h; perturbing each matrix value c of the to-be-restored blurred image by a perturbation trace d so as to obtain an error improvement value e of each perturbation; computing the range influenced by the maximum error improvement value e according to the blurring function h, and obtaining points of the influenced range; if the maximum error improvement value e is larger than zero, performing trace convergence for the points of the maximum error improvement value e so that pixel values of the points of the range influenced by the maximum error improvement value e are changed; and repeating the steps until the maximum error improvement value e is smaller than or equal to zero, and then terminating the algorithm so that the restored image is obtained. By the perturbation method, border effects can be eliminated to some degree, and direct processing of space variation during blurring can be facilitated.

Description

technical field [0001] The invention relates to an image deblurring algorithm, which belongs to the field of image processing. Background technique [0002] At present, in the process of image capturing, the captured images may be blurred due to inaccurate focusing, movement of the camera or the subject, and the like. And deblurring can improve the utilization quality of the image. [0003] The current image deblurring algorithms can be divided into two categories in the operational domain: frequency domain and spatial domain. [0004] Let the real scene be f, the blurred image obtained is g, g is the result of convolution by the degrading function h of f, plus the noise n, that is: g=f*h+n. [0005] Generally, considering that the blurring process of each place in the entire image is consistent, h is a function independent of pixel coordinates (x, y). In actual situations, the blurring process of different areas of the image may be quite different. [0006] The basic fre...

Claims

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Application Information

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IPC IPC(8): G06T5/00
Inventor 程欣宇
Owner 贵州时空设计有限公司
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