A methodology of synthesizing images from the point of view of considering the object's recognizability is developed. The viewing parameters determining the synthesized image are decided based on the recognizability of the object. An object is identified through the determination of its position and orientation. In this paper, it is shown that we cannot distinguish topographically similar objects from a single perspective. Thus, the thresholdi,determined by a scheme developed here for modeli, is used to check whether a candidate model is accepted.