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Standard deviation profile: (a) PERSSA-Renyi entropy; (b) SSA-Renyi entropy; (c) PERSSA-symmetric cross entropy; (d) SSA-symmetric cross entropy; (e) PERSSA-Kapur entropy; (f) SSA-Kapur entropy; (g) FCM. These three red stars are the optimal SD values on PSNR, SSIM, and FSIM respectively.
