How to perform the Image Enhancement (Laplacian)

Image Enhancement (Laplacian)

I try to perform the Matlab programming with formula equation for image processing as below

x = rgb2gray(imread('onion.png'));

lap = [1 1 1; 1 -8 1; 1 1 1];

lapfi = uint8(filter2(lap, x, 'same'));

sharpened = imsubtract(x, lapfi);

figure;

subplot(1,3,1);imshow(x); title('Original image');

subplot(1,3,2);imshow(lapfi); title('Laplacian filtered image');

subplot(1,3,3);imshow(sharpened); title('Sharpened image');

However I am not sure my answer is correct or not

Kindly please provide your opinion and suggestion thus I will be able to improve my computing skills

Answer 1

[Mehmet Cagri Aksoy]

img4=imread('PATH');

laplacian_mask = -1 * ones(3);

laplacian_mask(2,2) = 8;

img4_laplacian = conv2(img4, laplacian_mask, 'same');

img4_laplacian = img4 + uint8(img4_laplacian);

figure(4),

subplot(1,2,1), imshow(img4);

title(['\fontsize{8}Original Image ']);

subplot(1,2,2), imshow(img4_laplacian);

title(['\fontsize{8}Laplacian enhanced Image ']);

[M-Muaaz Orabi]

thank you very much