No-reference image quality evaluation method based on Curvelet transformation and phase coincidence

A quality evaluation and reference image technology, applied in the field of image analysis, can solve the problems of long time-consuming feature dimension classification and regression model training, long time-consuming feature extraction process, and large time complexity
CN103200421AInactive Publication Date: 2013-07-10BEIJING INSTITUTE OF TECHNOLOGYGY
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
BEIJING INSTITUTE OF TECHNOLOGYGY
Publication Date
2013-07-10
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a no-reference image quality evaluation method based on Curvelet transformation and phase coincidence. The no-reference image quality evaluation method based on Curvelet transformation and phase coincidence comprises the following steps: (1), images are transformed to a Curvelet domain and a phase coincidence domain; (2), a series of natural scene statistical characteristics are extracted from the Curvelet domain and the phase coincidence domain; the series of natural scene statistical characteristics comprise logarithm histogram peak value coordinates of Curvelet coefficients and phase coincidence coefficients, direction energy distribution characteristics and dimension energy distribution characteristics; and (3), a two-step frame is used, the series of characteristics extracted in the step 2 and a support vector machine are utilized for firstly classifying distorted images of unknown types, and then nonlinear regression of a specific type is conducted on the distorted images according to a classification result, and DMOS is forecasted according to an objective quality evaluation result of the images. The no-reference image quality evaluation method based on Curvelet transformation and phase coincidence has the advantages of being high in human eye subjective consistency, small in time complexity, and high in application value.
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Description

technical field

[0001] The invention relates to an image quality evaluation method, in particular to a reference-free image quality evaluation method based on Curvelet transformation and phase consistency, and belongs to the field of image analysis. Background technique

[0002] 70% of human beings obtain external information comes from the visual system. As an important medium for information transmission and communication, images are playing an increasingly important role in human life. Especially with the rapid development of multimedia technology and computer network technology, image processing technology is also moving towards digitization, networking and intelligence. Such as video conferencing, security monitoring, medical detection, satellite remote sensing, etc. However, in the process of digital image processing, due to the limitations of physical equipment and image processing algorithms, it will inevitably affect the quality of the image, which will greatly red...

Claims

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