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Universal no-reference image quality evaluation method based on phase selection mechanism

A technology of reference image and quality evaluation, applied in the direction of image communication, television, electrical components, etc., can solve the problem of inability to obtain the original image, and achieve the effect of improving the correlation

Active Publication Date: 2016-05-25
嘉兴企远网信息科技有限公司
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Problems solved by technology

Objective evaluation methods can be divided into three categories: full-reference image quality evaluation methods, semi-reference image quality evaluation methods, and no-reference image quality evaluation methods. Therefore, the research of no-reference image quality evaluation method is more practical

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  • Universal no-reference image quality evaluation method based on phase selection mechanism
  • Universal no-reference image quality evaluation method based on phase selection mechanism

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Embodiment Construction

[0022] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0023] A general non-reference image quality evaluation method based on the phase selectivity mechanism proposed by the present invention, its overall realization block diagram is as follows figure 1 As shown, the processing process is as follows: First, implement Log-Gabor filtering on the distorted image to be evaluated to obtain a multi-scale and multi-directional phase image; Values ​​are compared to obtain the local feature map; then the rotation invariance method is used to obtain the local feature pattern map of the local feature map, and the histogram statistical method is used to perform statistics on the local feature pattern map to obtain the histogram statistical feature vector of the distorted image to be evaluated ; Finally, according to the distance between the histogram statistical feature vector of the distorted image to be ev...

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Abstract

The invention discloses a universal no-reference image quality evaluation method based on a phase selection mechanism. The method comprises the steps of firstly implementing Log-Gabor filtering on a distorted image to be evaluated, thus obtaining a multi-scale and multi-directional phase image; comparing the pixel value of each pixel point in the phase image with the pixel values of surrounding pixel points to obtain a local feature map; then obtaining the local feature mode chart of the local feature map by a rotational invariance method, and performing statistics on the local feature mode chart by a histogram statistic method, thus obtaining the histogram statistic feature vector of the distorted image to be evaluated; and at last obtaining the objective quality evaluation predicted value of the distorted image to be evaluated according to the distance between the histogram statistic feature vector of the distorted image to be evaluated and the histogram statistic feature vector of each distorted image in a training set. The method has the advantages that the influence of the change of the phase information on the visual quality can be fully considered, and the correlation between the objective evaluation result and subjective perception can be effectively improved.

Description

technical field [0001] The invention relates to an image quality evaluation method, in particular to a general non-reference image quality evaluation method based on a phase selectivity mechanism. Background technique [0002] Image is an important way for human beings to obtain information. Image quality indicates the ability of image to provide information to people or equipment, and is directly related to the adequacy and accuracy of the information obtained. However, in the process of image acquisition, processing, transmission and storage, due to various factors, there will inevitably be degradation problems, which brings great difficulties to information acquisition or post-processing of images. Therefore, it is very important to establish an effective image quality evaluation mechanism. For example, it can be used for performance comparison and parameter selection of various algorithms in image denoising, image fusion and other processing processes; in the field of i...

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Application Information

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IPC IPC(8): H04N17/00H04N19/157
CPCH04N17/00H04N19/157
Inventor 周武杰邱薇薇王海文王中鹏周扬吴茗蔚葛丁飞施祥王新华孙丽慧陈寿法郑卫红李鑫吴洁雯王昕峰金国英王建芬
Owner 嘉兴企远网信息科技有限公司
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