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Design and analysis of algorithm no-reference image quality assessment based on local binary patterns

Keywords:

A.L. Priorov – Dr.Sc. (Eng.), Associate Professor, P.G. Demidov Yaroslavl State University. E-mail: andcat@yandex.ru I.S. Nenakhov – Post-graduate Student, P.G. Demidov Yaroslavl State University. E-mail: zergoodsound@gmail.com V.V. Khryashchev – Ph.D. (Eng.), Associate Professor, P.G. Demidov Yaroslavl State University. E-mail: vhr@yandex.ru


This paper presents the new algorithm for no-reference blind image quality assessment (NRQ LBP). This algorithm does not need a priori information about possible types of image distortions before assessment. No transformation to another coordinate frame (DCT, wavelet, etc.) is required, distinguishing it from prior no reference quality assessment approaches. NRQ LBP is based on machine learning and uses extremely randomized trees method for mapping quality features with subject quality score (DMOS). Quality features are bins of a histogram of local binary patterns calculated for neighborhood radiuses 1, 2, 3 pixels. Comparative experimental results a given for modern image quality assessment algorithms (PSNR, SSIM, MS-SSIM, LBIQ, LD-TS, GRNN, BRISQUE, NRLBPS). Images from standard LIVE database are used as training and testing datasets. Spearman correlation coefficient, Pearson correlation coefficient and RMSE are used to determine the accuracy of compared algorithms. The proposed approach has the highest correlation with subject quality scores between all tested no reference algorithms and competitive with reference MS-SSIM. NRQ LBP is more accurate for images distorted with JPEG2000 and Gaussian blur. For images distorted with bit errors the proposed algorithm is more accurate than tested no reference algorithms and is accurate as reference algorithms SSIM and MS-SSIM. Moreover, NRQ LBP has very low computational complexity, making it well suited for real time applications.
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