Matlab (Image Processing Toolbox) . imnoise, , , , . .
1) ( ):
L2=imnoise(L,'salt&pepper', 0.05);
figure, imshow(L2);
.2. ( ).
2) ( 0, - 0,01):
L1=imnoise(L,'gaussian');
figure, imshow(L1);
.3. ( ).
3) ( 0, 0,04):
L3=imnoise(L,'speckle',0.04);
figure, imshow(L3);
.4. ( ).