An iterative method for determining three-dimensional coordinates of a planar object surface from a pair of images obtained by a stereovision is proposed. The three-dimensional coordinates of an object surface are obtained from the pair of the image coordinates of the corresponding points. Then, the camera parameters are refined using the coordinates of the object surface. Repeating this procedure, the accurate three-dimensional coordinates of the planar object surface are obtained. The effectiveness of the proposed method is validated by evaluating the three-dimensional coordinates of a planar board. In addition, the proposed method is applied to the measurement of the crack tip displacement fields and the subsequent stress intensity factors evaluation. Results show that the accu-racy for determining three-dimensional coordinates of a planar object is improved by the proposed method.