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Table 1 Qualitative evaluation of different methods on synthetic noisy stele images

From: A de-noising method based on L0 gradient minimization and guided filter for ancient Chinese calligraphy works on steles

Methods PSNR SSIM
Zheng’s method [1] 26.801 0.9841
Zhang’s method [10] 29.010 0.9858
L0 gradient minimization [13] 27.062 0.9742
BM3D [17] 27.960 0.9801
Our prior work [11] 32.690 0.9882
Prior work [12] 32.783 0.9916
Proposed method 32.834 0.9952