Downsampling dependent upsampling of images

摘要

Downsampling an image results in the loss of image information that cannot be recovered with upsampling. We demonstrate that the particular combination of downsampling and upsampling methods used can significantly impact the reconstructed image quality, and then we propose a technique to identify patterns associated with different downsampling methods in order to select the appropriate upsampling mechanism. The technique has low complexity and achieves high accuracy over a wide range of images.