Method for objectively evaluating image quality based on region weight and visual characteristics of human eyes

An objective evaluation method and image quality technology, applied in image communication, image enhancement, image data processing, etc., can solve problems such as large degree of blur, lack of stability, and failure to consider the visual characteristics of the human eye

Inactive Publication Date: 2009-10-21
ZHEJIANG UNIV
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Problems solved by technology

However, it simply measures the grayscale difference between images or the relationship between signal and noise, and lacks stability under different image degradation conditions.
[0008] The newer algorithm is the SSIM (Structural Similarity) algorithm proposed by Wang Zhou et al., but its ability to evaluate images with a slig...

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  • Method for objectively evaluating image quality based on region weight and visual characteristics of human eyes
  • Method for objectively evaluating image quality based on region weight and visual characteristics of human eyes
  • Method for objectively evaluating image quality based on region weight and visual characteristics of human eyes

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Embodiment Construction

[0101] Use several commonly used grayscale images and VQEG (The Video Quality Experts Group) to use a huge database as a specific experimental object to directly test the effectiveness of this HVSWGM algorithm. The algorithm's ability to terminate iterations is tested using an iterative recovery experiment using a labeled layout.

[0102] Utilize the method of the present invention to process image, as figure 2 As shown, the evaluation value of the image quality can be obtained by inputting the reference image and the evaluation image. by Figure 3a (reference figure) and Figure 3b (Evaluation chart) as an example:

[0103] (1) Obtain images distributed by region weights. will refer to Figure 3a (hereinafter referred to as image f) and evaluation Figure 3b (hereinafter referred to as image g) input.

[0104] (a) First use the Gaussian function to improve the anti-noise ability, and get:

[0105] f 1 = G ...

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Abstract

The invention discloses a method for objectively evaluating the image quality based on region weight and visual characteristics of human eyes, which comprises the following steps: (1) acquiring images which are distributed according to the region weight; (2) applying modified human eyes to process images of sensitive functions; and (3) applying gradient information similarity to evaluate the images. The method is combined with the visual characteristics of the human eyes, so that the image processing result of the method is quite close to a human eye visual system, and the quality evaluation value according with the visual characteristics of the human eyes can be obtained as long as a reference image and an evaluation image are inputted. The method can be applied in the aspects of image compression, storage, transmission, reconstruction and the like, and quickly measures the image quality. Moreover, the method can be applied to iteration ending in the image restoration process, and the optimum restoration image obtained by using an evaluation algorithm to end an iteration algorithm is quite close to the optimum restoration image obtained by the evaluation of the human eyes.

Description

technical field [0001] The invention relates to computer image processing technology, in particular to an objective evaluation method of image quality based on region weight and human visual characteristics. Background technique [0002] With the development of human society towards high digitization, the rapid development and popularization of digital image, digital video and digital TV will become inevitable. In the various technologies of digital image processing, digital images may be subject to various degradations and distortions during the process of acquisition, compression, storage, transmission and reconstruction, and image degradation will inevitably occur. How to evaluate them more effectively The problem of image quality also arises at the historic moment. The output image quality of an image transmission, processing or compression system ultimately determines the quality of its technology and system. Therefore, the practical significance of image quality evalu...

Claims

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Application Information

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IPC IPC(8): H04N17/00G06T5/00
Inventor 赵巨峰冯华君徐之海李奇
Owner ZHEJIANG UNIV
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