There are four levels of implementation to apply:

1. To use “edge function” with the Canny, Sobel, Prewitt and LOG options

2.To use convolution filtering with both the “imfilter” and standard convolution techniques to implement Sobel, and Roberts edge detection.

3.To use a non linear or non convolution based technique to illustrate the application of “range” or“averaging” based edge detection.

4.To use a non-linear region based statistical technique to analyse differences in local image
texture