People can easily perceive object with incompletion boundary or combination of discontinuous edges. However, common approaches are difficult to segment an entire object without referring to completion contour. This paper introduces a scheme to reify an object based on law of closure in Gestalt psychology. The proposed scheme acquires initial boundaries and edges in advance, and then divides boundary into small edges according to key vertices on boundaries. Applying approximate line and approximate ellipse/circle to two edges, it determines whether two edges are highly related to each other or not. Consequently, path searching is implemented on all edges to find closed loop as well as to construct object with completion contour.