How to obtain high resolution images with little cost has become a research focus in the field of imaging. A method of obtaining high resolution image using image reconstruction technology based on object scanning is presented in this paper. First，a sequence of multiple images with small displacement by object scanning are obtained. Then，those images using Classical Keren algorithm are registered，whose registration accuracy is up to sub-pixel-level. There is only sub-pixel displacement between these low-resolution images，then interpolation reconstruction can be performed and a highresolution image is gotten. Simulation results show that the registration error of this image registration algorithm is less than 0.1 pixels，and image reconstructed by interpolation and reconstruction effectively gains a doubled-spatial-resolution with more details.