please help me to write this equations in matlab

how to write these three equations in matlab here L1 is the 3 by 3 matrix. Kindly help me to write these equations.

[Jan]

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What have you tried so far and which problems occurred?

Answer 1

[Image Analyst]

The Laplacian for discrete images is this:

kernel8 = [-1 -1 -1; -1 8 -1; -1 -1 -1];
filteredImage = conv2(imageArray, kernel8, 'same');

Use a different kernel if you want it in just the 4 directions:

kernel4 = [0 -1 0; -1 4 -1; 0 -1 0];

[Peer Mohamed]

Thank you very much this code is very much useful for me