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Motion-blurred image restoration method based on rotary difference and weighted total variation

A motion blurred image, blurred image technology, applied in the field of image processing, can solve the problems of multiple ringing, loss of image details, etc., to achieve the effect of suppressing ringing and enriching image details

Inactive Publication Date: 2011-11-09
GUIZHOU UNIV
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  • Claims
  • Application Information

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Problems solved by technology

However, the images restored by these methods generally have more ringing, and some details of the image are lost.

Method used

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  • Motion-blurred image restoration method based on rotary difference and weighted total variation
  • Motion-blurred image restoration method based on rotary difference and weighted total variation
  • Motion-blurred image restoration method based on rotary difference and weighted total variation

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Embodiment Construction

[0034] Embodiments of the present invention: In order to make the purpose, technical solutions and effects of the present invention clearer, the present invention will be further described in detail below in conjunction with specific implementation steps and with reference to the accompanying drawings.

[0035] Suppose the degradation model of the image is expressed as

[0036] (1)

[0037] In the formula g , h , f and n denote degraded blurred image, blur kernel, original image and noise, respectively, and * denote convolution operation. figure 1 It is a flowchart of the method of the present invention, specifically comprising the following steps:

[0038] Step 1: Estimate the motion direction of the motion blur image by using the motion blur direction spatial domain estimation method based on the rotation difference operator.

[0039] by rotating figure 2 The horizontal difference operator in the method obtains a series of differen...

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Abstract

The invention discloses a motion-blurred image restoration method based on rotary difference and weighted total variation, which is characterized by comprising the following steps: 1, estimating the motion direction of a motion-blurred image by using a motion-blurred direction space-domain estimation method based on a rotary difference operator; 2, estimating the motion length of the motion-blurred image by using a blurred image point spread function parameter estimation method based on error analysis; and 3, determining a blur kernel in accordance with the steps 1 and 2, and carrying out image restoration to obtain a sharp image by using a weighted total variation regularized image restoration method, i.e. using the weighted difference operator to detect the edges of the image in all directions, using the weighted difference operator as a total variation regular item to retain more image details, and solving the weighted total variation model by using a fixed point lagging and spread method so as to finish image restoration. By using the method to restore the motion-blurred image, the acquired image can well inhibit ringing, abundant image details can be retained, and the restored image can achieve high quality.

Description

technical field [0001] The invention relates to a motion blurred image restoration method, which belongs to the technical field of image processing. Background technique [0002] Image restoration is an important branch of image processing. Its task is to remove the degradation factors from the degraded image and restore it to the image before degradation with maximum fidelity. During image acquisition, image quality will be degraded due to relative motion, focus misalignment, noise and other factors. Image restoration is to establish corresponding degradation models for these image degradation situations, and then perform image restoration processing according to the inverse process of the degradation model, so as to obtain a restored image close to the original image. The factors that cause image quality degradation are different, and the corresponding image restoration methods are also different. Among them, image restoration for motion blur is called motion blur remova...

Claims

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Application Information

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IPC IPC(8): G06T5/00
Inventor 杨霜雪颜小运刘洪刘本永廖翔
Owner GUIZHOU UNIV
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