We propose rapid hybrid interpolation methods that employ more than one interpolation algorithm, and choose the most appropriate interpolation algorithm that provides high-quality images with a minimum number of operations. Although a complex interpolation algorithm generally outperforms a simple interpolation algorithm, the differences are negligible for most pixels, with major differences occurring around edges. Thus, in the proposed algorithm, we first apply a test to predict which interpolation is most appropriate for a given pixel in terms of complexity and performance. Then, a simple interpolation algorithm is used for pixels for which the simple interpolation algorithm provides acceptable performances, and a complex interpolation algorithm is used for pixels for which the complex interpolation algorithm significantly outperforms the simple interpolation algorithm. Consequently, it is possible to obtain high-quality images without significantly increasing the number of operations.
Bibliographical noteFunding Information:
We thank anonymous reviewers for their thoughtful and concerned comments that have enabled us to improve this work. The Korea Science and Engineering Foundation partly supported the publication of this paper through BERC at Yonsei University.
All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics