title: Learning Super-Resolution Jointly From External and Internal Examples.
abstract: Single image super-resolution (SR) aims to estimate a high-resolution (HR) image from a low-resolution (LR) input. Image priors are commonly learned to regularize the, otherwise, seriously ill-posed SR problem, either using external LR-HR pairs or internal similar patterns. We propose joint SR to adaptively combine the advantages of both external and internal SR methods. We define two loss functions using sparse coding-based external examples, and epitomic matching based on internal examples, as well as a corresponding adaptive weight to automatically balance their contributions according to their reconstruction errors. Extensive SR results demonstrate the effectiveness of the proposed method over the existing state-of-the-art methods, and is also verified by our subjective evaluation study.
authors.forename: Zhangyang
authors.initials: Z
authors.lastname: Wang
authors.forename: Yingzhen
authors.initials: Y
authors.lastname: Yang
authors.forename: Zhaowen
authors.initials: Z
authors.lastname: Wang
authors.forename: Shiyu
authors.initials: S
authors.lastname: Chang
authors.forename: Jianchao
authors.initials: J
authors.lastname: Yang
authors.forename: Thomas S
authors.initials: TS
authors.lastname: Huang