I am very new to the concept of computer vision (and image processing), and trying to understand the algorithm used for edge detection. One thing I'm currently struggling to figure out is the Laplacian of Gaussian
In this case, how to you determine the value of x and y? I thought the centre of the kernel was the origin $((x,y) = (0,0))$, but it doesn't seems like the right number.
Also, if there are any resources that you would recommend to go through, I would really appreciate them.