Phase-based stereo image quality objective evaluation method
A technology for objective quality evaluation and stereoscopic images, which can be used in stereoscopic systems, image communication, television, etc., and can solve problems such as lack of
Inactive Publication Date: 2012-12-26
NINGBO UNIV
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However, there is currently a lack of effective objective evaluation methods to evaluate the quality of stereoscopic images.
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[0062] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0063] A phase-based stereoscopic image quality objective evaluation method proposed by the present invention, its overall realization block diagram is as follows figure 1 As shown, it includes the following steps:
[0064] ① Order S org To be the original undistorted stereo image, let S dis For the distorted stereo image to be evaluated, set S org The left view image of is denoted as {L org (x,y)}, the S org The right view image of is denoted as {R org (x,y)}, the S dis The left view image of is denoted as {L dis (x,y)}, the S dis The right view image of is denoted as {R dis (x, y)}, where (x, y) represents the coordinate position of the pixel in the left-viewpoint image and the right-viewpoint image, 1≤x≤W, 1≤y≤H, W represents the left-viewpoint image and the right-viewpoint The width of the image, H represents the height of the le...
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The invention discloses a phase-based stereo image quality objective evaluation method, comprising the following steps of: firstly, calculating the local phase characteristics of each pixel in the distorted and undistorted left and right view point images, and obtaining an objective evaluation metric for reflecting the image quality of the distorted stereo image according to the local phase characteristics; and then, executing singular value decomposition on the absolute difference images of the distorted and undistorted left and right view point images, calculating the local phase characteristics of the built images of the stripping singular value information of the absolute difference images to obtain the objective evaluation metric for reflecting the depth perception of the distorted images; merging the metrics respectively used for reflecting the image quality and the depth perception to obtain the final objective evaluation predicted value. The method provided by the invention has the advantages that the phase characteristic information reflecting the image quality and the depth perception has stronger stability and can reflect the changes of the quality of the stereo images better, so that the relativity between the objective evaluation result and the subjective perception is improved.
Description
technical field [0001] The invention relates to an image quality evaluation method, in particular to an objective phase-based stereoscopic image quality evaluation method. Background technique [0002] With the rapid development of image coding technology and stereoscopic display technology, stereoscopic image technology has received more and more attention and applications, and has become a current research hotspot. Stereoscopic image technology utilizes the binocular parallax principle of the human eye. Both eyes independently receive left and right viewpoint images from the same scene, and form binocular parallax through brain fusion, so as to enjoy a stereoscopic image with a sense of depth and realism. Due to the influence of acquisition system, storage compression and transmission equipment, stereoscopic images will inevitably introduce a series of distortions. Compared with single-channel images, stereoscopic images need to ensure the image quality of two channels at ...
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IPC IPC(8): H04N17/00H04N13/00
Inventor 邵枫胡朝正蒋刚毅郁梅李福翠
Owner NINGBO UNIV