In this paper, a new method was presented to solve image shape restoration problem. The independent parameter(IDP) is defined to describe the image distortion degree. Then the problem of image shape restoration is transformed to a optimization problem. A simplex method is used to solve the optimization problem. The new approach has two merits: It is a unsupervised unsupervised and it is suit not only for linear shape distortion, but also for nonlinear shape distortion. The performance of the proposed approa...