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Objective evaluation method for quality of three-dimensional image based on improved structural similarity

A technology for objective quality evaluation and structural similarity, applied in the field of image processing, to achieve the effect of improving evaluation defects, accurate and effective evaluation, and strong consistency

Inactive Publication Date: 2015-08-19
TIANJIN UNIV
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Problems solved by technology

[0004] The present invention aims to solve the shortcomings of the traditional structural similarity index measurement (SSIM) in stereoscopic image quality evaluation, and provides a stereoscopic image quality evaluation method based on improved structural similarity, which introduces structural information into the frequency domain, Combining the texture features of the image and the spatial position information of the image, it can make a comprehensive and accurate comprehensive evaluation of the quality of the stereoscopic image

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  • Objective evaluation method for quality of three-dimensional image based on improved structural similarity
  • Objective evaluation method for quality of three-dimensional image based on improved structural similarity
  • Objective evaluation method for quality of three-dimensional image based on improved structural similarity

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Embodiment Construction

[0028] The reference experimental materials used in this design are all taken from the stereo information library provided by the Institute of Broadband Wireless Communication and Stereo Imaging. A total of 6 uncompressed and unnoised original images in the image library are selected, which are the standard stereo materials "boy", "family", "flower", "girl", "river", "tree", the resolution is 1280*1024, such as Figures 1 to 6 shown. Using MATLAB to compress and add noise to the 6 original images to different degrees, a total of 270 distorted images were obtained, and all distorted images were subjectively evaluated, and the Mean Opinion Score (MOS) was recorded to verify the subjective and objective scores of stereo images. correlation.

[0029] The method is described in detail below in conjunction with the content of the invention.

[0030] The stereo image quality evaluation process calculates the average structural similarity LMSSIM(x,y) and RMSSIM(x,y) of the left and ...

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Abstract

The invention provides an objective evaluation method for the quality of a three-dimensional image based on improved structural similarity, which comprises the steps of firstly establishing a method for calculating the mean structural similarity of a certain distortion image; calculating a frequency domain structural similarity index; calculating a texture information coefficient; weighting an image region by using a spatial position factor; considering an image central region in which the human eyes are interested, and calculating a spatial position influence coefficient; integrating the texture information coefficient and the spatial position influence coefficient into a comprehensive weighting coefficient according to a formula provided in the description, carrying out weighted averaging on the frequency domain structural similarity index of each image block by using the coefficient, and calculating the average structural similarity; and calculating the average structural similarity of a left viewpoint and the average structural similarity of a right viewpoint of the three-dimensional image according to method established by the steps for calculating the average structural similarity of the distortion image, and acquiring a quality evaluation index of the three-dimensional image. The objective evaluation method provided by the invention can make overall and accurate comprehensive evaluation for the quality of the three-dimensional image.

Description

technical field [0001] The invention belongs to the field of image processing, and relates to an image quality evaluation method, in particular to a stereoscopic image objective quality evaluation method based on improved structural similarity. Background technique [0002] With the vigorous development of multimedia technology, stereoscopic image technology came into being. However, there is not yet a complete set of objective evaluation system of stereoscopic image quality to evaluate the quality of distorted stereoscopic images, and there are still great limitations in evaluating the quality of stereoscopic images. [0003] At present, the evaluation of stereoscopic images includes subjective evaluation and objective evaluation. The former relies on the subjective feeling of the observer, but the conclusion of the evaluation is greatly influenced by the observer's own factors, which is time-consuming and labor-intensive; Therefore, it is very necessary to seek an object...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00G06T7/40
CPCG06T7/0002G06T7/45G06T2207/30168
Inventor 李素梅刘富岩佟晓煦侯春萍
Owner TIANJIN UNIV
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