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Laplacian filter is a second derivative edge detector operator .Laplacian is more sensitive to noise than sobel and prewitt.Laplacian calculate the difference of center point to the surrounding pixels .

Code:

    clc
;
   
    
%% create a new figure to show the image . 
    newImg 
= imread('Water lilies.jpg');
    figure(1);
    imshow(newImg);
    figure(2);
     %% create laplacian filter. 
    H 
= fspecial('laplacian');
     %% apply laplacian filter. 
    blurred 
= imfilter(newImg,H);
    imshow(blurred); title('Edge detected Image')

 





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_________________
M. S. Rakha, Ph.D.
Queen's University
Canada
Author:
Mastermind
User avatar Posts: 2715
Have thanks: 74 time

hi, do u know how to apply 3x3 laplacian filter with 8 at the center?



Author:
Newbie
User avatar Posts: 1
Have thanks: 0 time
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