A Mobile Computing Method Using CNN and SR for Signature Authentication with Contour Damage and Light Distortion

Table 1

Deduced golden G-L filtering algorithm for mending contour damage of signature image.


输入:	The original signature image .

Output:	The filtered image .

步骤1:	For each pixel of ,calculate the global mean gray valueand the variance根据(1) and (2), respectively.

Step 2:	Calculate the local mean gray valueof the pixel according to (3).

Step 3:	Calculate the G-L mean gray valueof the pixel according to (4).

Step 4:	Calculate the improved Gaussian template according to (5) and (6).

步骤5:	Add salt and pepper noise signature imageand obtain the filtered image .

Step 6:	For each pixel, filter the noise signature imageby the convolution operation using the improved Gaussian template ,and obtain the filtered image .