The process is split into parts. The need to be able to split off from the other. The cut material can be divided as follows:
Area (size) or the recognition of the object, however, to find the correct picture perfect is not easy, especially the edges of the image quality is lower there. The difference between the foreground and the background, or the brightness is not uniform across the image edges caused by the difference in light intensity from one point to another point, if the difference is more valuable edge it. Obviously, if the difference is less. The image is not clear Unlike the edges are together. Unlike the edges are too many ways. Can be divided into two main groups: Gradient method and Laplacian method for Gradient method to find the edge by finding the lowest point and the highest point in the second derivative of the image, such as Sobel, Roberts, Prewitt, Canny etc. Laplacian method to find. edges using derivatives rank second on the value of y is 0 (Zerocrossing) in the image, such as Laplacian of Gussian.
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