An Objective Evaluation Method of Stereo Image Quality Based on Perceptual Feature Set

A technology for objective quality evaluation and stereoscopic images, which is applied in the field of objective evaluation of stereoscopic image quality based on perceptual feature sets, and can solve the problems of difficult measurement of stereoscopic perception, low evaluation accuracy, and low consistency of subjective perception

CN104954778BActive Publication Date: 2017-05-24NINGBO UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2017-05-24

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Abstract

The invention discloses an objective stereo image quality assessment method based on a perception feature set. According to the method, the distortion degree of a stereo image is measured according to the distortion degree of a visual perception feature map, a saliency map, a gradient map and an airspace just noticeable distortion map which are related to viewpoint perception quality are extracted, a disparity map related to third dimension and quality is extracted, distortion degrees of four perception feature maps are taken as features of the stereo image to create the perception feature set, a complicated human vision system is simulated according to a random forest machine learning algorithm, and feature parameters are fused. The objective stereo image quality assessment method has the advantages that change conditions of visual quality under the condition that the stereo image is influenced by various image processing and compressing methods can be reflected objectively, assessment performance of the method is not influenced by the content of the stereo image and the type of distortion, and conformity with subjective perception of human eyes is achieved.
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Description

technical field

[0001] The invention relates to an image quality evaluation method, in particular to an objective evaluation method of stereoscopic image quality based on a perceptual feature set. Background technique

[0002] Stereo Image Quality Assessment (SIQA) is an important part of stereoscopic video technology. Stereoscopic images / videos will inevitably introduce noise or distortion in the collection, storage, processing and transmission, resulting in the degradation of stereoscopic image / video quality. Therefore, the evaluation of stereoscopic image / video quality is an important issue that needs to be studied and solved. . Stereoscopic image quality evaluation methods are generally divided into two categories: subjective and objective. The subjective evaluation method is not easy to realize and apply due to its shortcomings of time-consuming, laborious and high cost; while the objective evaluation method is an integrated algorithm and model, which can quickly and ...

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Embodiment Construction

[0046] The present invention will be further described in detail below with reference to the embodiments of the accompanying drawings.

[0047] Human eyes have different degrees of sensitivity to distortion in stereo images, so the evaluation method of global quality obtained from local quality is less consistent with subjective perception, while perceptual feature maps are the shallow reflection of stereo images in the human nervous system. Image is the most intuitive feeling in the human eye. When the distortion of the stereoscopic image leads to the distortion of the perceptual feature map, the human eye will also be sensitive to detect these distortions. Therefore, the objective evaluation method of the stereoscopic image quality proposed by the present invention extracts four kinds of perceptual feature maps, It includes saliency map, gradient map, spatially perceptible distortion map and disparity map, and uses the degree of distortion as a characteristic parameter to for...