Historic Document Processing using k-Flat Hyperconnected Filters
Georgios K. Ouzounis · 2009
0.7744 0.9418 0.2690 0.4188 0.2613 0.3388 0.2408 0.2588 k-flat methods k = 0 0.8028 0.9479 0.8038 0.9479 0.2668 0.6020 0.2521 0.4536 k = 80 0.8585 0.9626 0.6311 0.7831 0.3105 0.4837 0.2449 0.2875 k-absorption methods k = 80 0.9982 0.9980 0.9948 0.9937 0.9902 0.9896 0.9606 0.9649 Other methods Anisotropic diffusion 0.7044 0.9835 0.2818 0.9861 0.2769 0.9819 0.2629 0.9037 Rolling ball 0.7770 0.9453 0.2696 0.4314 0.2621 0.3470 0.2417 0.2630 50% no filter 0.7733 0.9394 0.2526 0.3918 0.2327 0.3006 0.1887 0.2028 k-flat methods k = 0 0.8017 0.9461 0.2614 0.6911 0.2475 0.5746 0.2138 0.4074 k = 80 0.8576 0.9609 0.6150 0.7609 0.2861 0.4510 0.1969 0.2340 k-absorption methods k = 60 0.9980 0.9981 0.9853 0.9841 0.9619 0.9634 0.8024 0.8425 k = 80 0.9980 0.9981 0.9763 0.9731 0.9542 0.9500 0.9013 0.9012 Anisotropic diffusion optimized for UQI 0.7043 0.9827 0.2744 0.9174 0.2538 0.6532 0.1991 0.2939 optimized for SSIM 0.7043 0.9827 0.2557 0.9559 0.2171 0.9084 0.0972 0.7278 Figure 3: Simulated Images