Edge Detection in Matrix Form

Hi my main problem is how can i detect edges in 3x3 matrix not image my values are

matrix 7 8 9;4 5 6;1 2 3

edge detector 1 2 3; 4 5 6; 7 8 9

please help me for detecting matrix edges with convolution

Answer 1

[Image Analyst]

Try this:

grayImage = imread('moon.tif');
subplot(1, 2, 1);
imshow(grayImage, []);
impixelinfo

edgeDetector = [1 2 3; 4 5 6; 7 8 9]; % Not a good edge detector!
edgeDetector = [1 1 1; 0 0 0; -1 -1 -1]; % Better edge detector.
filteredImage = conv2(double(grayImage), edgeDetector, 'same');
subplot(1, 2, 2);
imshow(filteredImage, []);
impixelinfo

[can evkuran]

Thanks for help but i need to do in matrix form not image i have a matrix (7 8 9; 4 5 6; 1 2 3) main problem is detecting edges on this matrix not image form

[Image Analyst]

So just replace the moon image with your image or matrix. I thought you'd understand to do that, but anyway, here it is:

matrix = [7 8 9; 4 5 6; 1 2 3]
subplot(1, 2, 1);
imshow(matrix, []);
impixelinfo
edgeDetector = [1 2 3; 4 5 6; 7 8 9]; % Not a good edge detector!
% edgeDetector = [1 1 1; 0 0 0; -1 -1 -1]; % Better edge detector.
filteredImage = conv2(matrix, edgeDetector, 'same');
subplot(1, 2, 2);
imshow(filteredImage, []);
impixelinfo

Now, you know that the filter window can only fit complete inside your matrix at ONE location, don't you?

[can evkuran]

I understand now thanks for your help. if i have a problem ı wıll type here regards