k x k Thinning

A commonly used method for thinning regions in binary images consists of examining kernels of 3x3 pixels throughout an image, and erasing the center pixel if the thinning criteria are met. The kxk thinning method is a generalization of the 3x3 method, where kxk kernels are examined and a cent core of k-2 x k-2 pixels is erased if the criteria are met.