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Full-reference screen image quality evaluation method

A technology of screen image and quality assessment, applied in image analysis, image data processing, instrument, etc.

Inactive Publication Date: 2016-07-27
HUAQIAO UNIVERSITY
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  • Claims
  • Application Information

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Problems solved by technology

Therefore, the prior art also lacks an effective method for evaluating the quality of screen images

Method used

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  • Full-reference screen image quality evaluation method
  • Full-reference screen image quality evaluation method

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Embodiment Construction

[0047] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0048] In order to solve the problem that the evaluation method in the prior art cannot be applied to the quality evaluation of screen images, the present invention provides a full-reference screen image quality evaluation method, based on the gradient magnitude and gradient direction similarity, such as figure 1 As shown, the specific steps are as follows:

[0049] 1) Input a reference screen image r and a distorted screen image d;

[0050] 2) Obtain the gradient magnitude map M of the reference screen image r r' , Gradient pattern O r' , the gradient magnitude map M of the distorted screen image d d' , Gradient pattern O d' ;

[0051] 3) Get the gradient magnitude map M of the reference screen image r r' Gradient magnitude map M with distorted screen image d d' Gradient magnitude similarity; get the gradient direction map O of the ref...

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Abstract

The invention relates to a full-reference screen image quality evaluation method. The method is based on the similarity of gradient magnitudes and gradient directions; the characteristics of a human visual system and the characteristics of screen images are fully considered; edge information which is very sensitive to screen image distortion is deeply researched; the gradient magnitudes and gradient directions are effectively utilized to calculate the subjective similarity of a reference screen image and a distorted screen image; and the subjective perception of the human visual system for the screen images can be fully reflected. The full-reference screen image quality evaluation method has the advantages of high screen image quality evaluation performance, simple calculation and low time complexity.

Description

technical field [0001] The invention relates to an image quality evaluation method, more specifically, to a full-reference screen image quality evaluation method. Background technique [0002] With the rapid development of mobile Internet and cloud computing technology, the widespread popularization of systems such as distance education and video conferencing, screen images have become a hot research topic in industry and academia. [0003] Image quality is an important indicator for comparing the performance of various image processing algorithms and optimizing related system parameters. Therefore, it is of great significance to establish an effective image quality assessment mechanism in the fields of image acquisition, encoding and compression, network transmission, and display. [0004] Image quality assessment methods can be divided into subjective assessment methods and objective assessment methods. [0005] The subjective evaluation method is to observe the image wi...

Claims

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Application Information

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IPC IPC(8): G06T7/00
Inventor 曾焕强倪张凯马林蔡灿辉马凯光
Owner HUAQIAO UNIVERSITY
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