4K Image Resolution Enhancement Artifacts Database

This database construct a 4K images set containing 24 4K pristine images and 768 enhanced 4K images with different super-resolution distortion types and different distortion levels. Then, a subjective study with over 20000 human judgements are organized to reach reliable reference from human visual perception. Distorted images are generated by five classic interpolation methods and seven typical DNN-based super-resolution algorithms.