MATLAB Image Sharpening - Gaussian High Pass Filter using (1- Gaussian Low Pass Filter)

Question

I am trying to sharpen an image by designing a Gaussian High-Pass Filter. I would like to do this using the fact that the high-pass filter is equivalent to the identity matr

Answer 1

I= imread('peppers.png'); % read image
H = padarray(2,[2 2]) - fspecial('gaussian' ,[5 5],2); % create unsharp mask % create unsharp mask
figure,imshow(I);
K = imfilter(I,H);  % create a sharpened version of the image using that mask
figure,imshow(K); %showing input & output images