Find the perimeter of objects in the picture. With that in mind a line around the object. We can calculate area (size) or know the type of objects that need. However, finding the right edge of picture is not complete as easy. In particular, finding the edge of the picture quality is less difference between foreground and background, low Or brightness is not always around the image edge image resulting from the difference in intensity from one point to another point if it is different this valuable edge image will be visible. If the difference is less. Edge images is not clear.
