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Non-reference image quality assessment algorithm based on discrete cosine transform


Е.А. Pavlov – Post-graduate, Demidov Yaroslavl State University. E-mail:
О.N. Gushchina – Post-graduate, Demidov Yaroslavl State University. E-mail:
А.L. Priorov – Dr.Sci. (Eng.), Demidov Yaroslavl State University. E-mail:
V.V. Khryashchev – Ph.D. (Eng.), Demidov Yaroslavl State University. E-mail:

The task of objective image quality assessment is inextricably linked with the development of algorithms that could automatically determine the quality of the image. Human is an end user of visual information, thus development of such criteria, which allowed us to estimate the image quality as people would rate is important. Adequacy of objective quality assessment algorithms and their comparison are performed by measuring the degree of correlation of these algorithms with mean option score. Various statistical factors, such as the Spearman’s rank correlation coefficient, Pearson’s linear correlation, the value of the mean square error are used in practice. High value of the coefficients of linear correlation and Spearman correlation indicates the adequacy of the algorithm. Currently, the most urgent problem is the development of non-reference algorithms whose work is possible without using the original undistorted (reference) image, which in practice is usually not available. At the same time non-reference quality assessment algorithms is limited only to certain kinds of distortions: for example, blurring artifacts in compression JPEG and JPEG2000 and others. In this paper a new universal algorithm for non-reference image quality evaluation based on statistics of discrete cosine transform (DCT) coefficients and the training procedure based on image LIVE are proposed. Experimental results demonstrate that proposed algorithm can be effectively used for quality assessment of noised and compressed images as wells as for denoising and deblocking algorithms comparison.


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