Image upsizing with adaptive Wiener filtering method using self-prediction

In this paper, a straightforward and effective method for image upsizing is presented; upsizing is considered to be an essential operation in image processing. The Wiener filtering method is a well-known optimal framework for signal prediction, which provides information of original and degraded signals. In image upsizing, the Wiener filtering framework is not valid because of the missing information about the upsized target image. The proposed method employs a self-prediction scheme where a down-sampled image of the original image is used for the Wiener filter prediction and the obtained filter coefficient is actually used in the upsizing of the original image. The experimental validation shows improvement in both visual and objective quality.