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Latest Article: Quality assessment for JPEG images based on difference of power spectrum distribution

发布:foc2010阅读:1627时间:2015-3-20 09:13:35
Front. Optoelectron.
Quality assessment for JPEG images based on difference of power spectrum distribution
Binbing LIU(),Haiqing CHEN
School of Optical and Electronics Information, Huazhong University of Science and Technology, Wuhan 430074, China


Abstract  

No-reference quality assessment aims at designing objective assessment criteria consistent to subjective perceived quality without any knowledge about reference image. This paper proposes a no-reference quality assessment algorithm specific to JPEG images. Blocking artifact in JPEG images is caused by the block based quantization of frequency coefficients, which is equivalent to applying low pass filtering in each block. In view of this idea, the algorithm in this paper was used to realize the quality assessment of JPEG images by quantizing the difference of power spectrum distribution between inner-block and inter-block. The assessment method proposed in this paper owns low algorithm complexity, clear physical meanings, free from learning and training and other advantages. Compared with most presented algorithms, the assessment results of proposed algorithm demonstrate a higher correlation to the subjective perceived quality.


 
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