Object-end positioning method and system

An object-end positioning system for positioning lower ends of two limbs of an object, the system comprising:

• a capturing unit, for obtaining an original image corresponding to an image information of the object;
• a processing unit, for performing a foreground processing on the original image to obtain a foreground image corresponding to an outline of the object, wherein the processing unit obtains a plurality of turning points according to the foreground image, connection of the turning points forms a polygonal curve substantially approximate to the outline of the object in the original image, and the processing unit determines each of the turning points to be a convex point or a concave point according to an included angle between two lines connecting the turning point to two adjacent turning points and selects a plurality of selected convex points and a plurality of selected concave points along a predetermined direction;
• a matching unit, for selecting two of the selected convex points as two temporary ends, wherein connection of the two temporary ends and a selected concave point located between the two temporary ends forms a triangle corresponding to the two limbs of the object in the original image;
• and
• a positioning unit, for determining two positioning ends for positioning the lower ends of the two limbs of the object according to the two temporary ends.