MATLAB: I applied ‘unsharp’ for sharpening: code worked, but it did not give that good result

imageMATLABsharpeningunsharp

i have an image of some face. in that image, human faces are quite blurred. so i applied this code for sharpening the image, it did not help that much. i applied this code, but it appeared that some small noise has been created and the image is not really sharp.
this is the code
image = 'exp.bmp';
k = imread(image);
imshow(k);
drawnow();
k1= fspecial('unsharp');
I = imfilter(k,k1,'same');
imshow(I);
drawnow()
please let me know if there is problem in my code or if there is any good alternative for sharpening images.

Best Answer

Not sure what you expect. It will steepen existing edges but it can't invent information. It can't get you information that wasn't there in the original image. Where did you post your images? (Try http://snag.gy)
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