The MATLAB P-code for estimating quality of JPEG compressed images. The code can be exploited to estimate quality of JPEG compressed images irrespective of block size and position of blocking artifact.
imagename='img177.png' % image is given in the folder (1) ***************Algorithm proposed in the paper**************** Q= Q_P_u_S_u(imagename) % function to compute strength of blockiness and given in the folder % Q is the quality score of the compressed image % The value of Q is higher for more compressed image *************************************************************************** The following two methods (2) and (3) are additional for scenarios other than discussed in the paper. (2) ***************When block size is known (8x8) and artifact position is unknown**************** Q= Q_P_u_S_k(imagename) % function to compute strength of blockiness and given in the folder % Q is the quality score of the compressed image % The value of Q is higher for more compressed image ************************************************************************************ (3)***************When block size is known (8x8) and artifact position is known (artifact at 8th position)**************** Q= Q_P_k_S_k(imagename) % function to compute strength of blockiness and given in the folder % Q is the quality score of the compressed image % The value of Q is higher for more compressed image ************************************************************************************
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