1. First, take a signature picture with black characters on a white background with your mobile phone, and make an electronic signature with matlab.

2. Open matlab and copy the following code:

I 1 = imread(' C:\ Users \ Administrator \ Desktop \ 1 . jpg ')；

i 1=i 1(:，:， 1)；

I 1 = I 1 & gt； 120; The% threshold can be set by yourself.

I 1 = uint 8(I 1)；

I 1(find(I 1 = = 1))= 255； Fig. im show (I1); imwrite(i 1，' C:\ Users \ Administrator \ Desktop \ qianming . png ')；

3. Then the completed electronic signature will appear on your desktop, and the final result is as follows: