Write a computer program that will perform a region-growing operation based on +4-connectivity. The routine should start at the 1,1 corner pixel, search for a nucleus, grow a region with a chosen index number, and, after finishing that region, continue searching for other nuclei until all object pixels have been checked.  Write a computer program that will perform a region-growing operation based on × 4-connectivity. The routine should start at the 1,1 corner pixel, search for a nucleus, grow a region with a chosen index number, and, after finishing that region, continue searching for other nuclei until all object pixels have been checked.