For the edge detection, try sobel or laplacian: http://www.pages.drexel.edu/~weg22/can_tut.html http://www.pages.drexel.edu/~weg22/can_tut.html For uniform se

For the edge detection, try sobel or laplacian: http://www.pages.drexel.edu/~weg22/can_tut.html http://www.pages.drexel.edu/~weg22/can_tut.html For uniform segments, perhaps quadtree decomposition: http://matlab.izmiran.ru/help/toolbox/images/enhanc12.html http://matlab.izmiran.ru/help/toolbox/images/enhanc12.html