Matlab question

Do the gradient images look like you expect them too? Why or why not?

What is missing from the above question and how would you fix it?

commandwindow;

%imshow(checkerboard(20));

imwrite(checkerboard(20), 'checkerboard.jpg', 'JPEG');

myImage = imread('checkerboard.jpg');

Sx = [1 0 -1; 2 0 -2; 1 0 -1];

Sy = [1 2 1; 0 0 0; -1 -2 -1];

sobelXImage = conv2(double(myImage), Sx, 'same');

sobelYImage = conv2(double(myImage), Sy, 'same');

figure('Name', 'X gradient');

imshow(uint8(sobelXImage));

figure('Name', 'Y gradient');

imshow(uint8(sobelYImage));