An image interpolation method by projection satisfying reconstruction constraint

Abstract

An image interpolation method is proposed. An input image can be considered to be a deteriorated one from an unknown original image with more pixels than it. The image interpolation can be treated as an underdetermined problem to reconstruct the original image from the input image. In the proposed method, an output image by an arbitrary method is moved closer to the original image by a projection satisfying a reconstruction constraint that the output image should coincide with the input image by an assumed deterioration. Experimental results showed the effectiveness of the proposed method.