Table 1: Classification accuracies of AMIs, MSA, and the proposed method for Chinese characters in case of affine transformation and different intensities of salt and pepper noise.

Noise degree 0 0.005 0.010 0.015 0.020 0.025 0.030

AMIs 91.70% 45.50% 34.82% 28.54% 23.82% 19.89% 17.77%
MSA 94.48% 90.63% 73.57% 53.80% 38.16% 26.86% 19.88%
Our method 98.14% 96.21% 93.48% 89.46% 86.25% 82.07% 77.59%