For image processing in image processing, video image processing in the necessary basic steps. From image of first a pixel points began according to line traverse all pixel, in each pixel points Shang, mobile structure elements b of mapping of Center with coincide, then judge this location of structure elements whether has on a, collection of covered, if has, is retained this points, otherwise on this points take anti-(according to following of symbols agreed, is pity Dorado gray value set for 0).