An image expansion method by using sub-pixel information

摘要

A novel scheme for digital image expansion without artifact is introduced, which utilizes sub-pixel information. The proposed method achieves accurate sub-pixel interpolation, and enlarges the original image by using convolution of Lanczos function. Thus, the resolution of the digital image is increased by the proposed interpolation. Simulation results show the performance of the proposed approach is superior to that of the conventional cubic convolution method.