32‐2: Improvement in Directional Cubic Convolution Image Interpolation
Xiaolei Liu, Jiankang Sun, Guixin Yan, Yaoyu Lu, Yachong Xue, Gang Li, Lili Chen, Hao Zhang · SID Symposium Digest of Technical Papers · 2020
Compared with traditional methods, edge‐based interpolation algorithm can generate high‐resolution images with rare edge artifacts. However complex textured regions produce morphological distortion at the same time, resulting in a HD image looks unnatural. In this paper, we analyze the disadvantages of the best performing edge‐based interpolation (DCCI) algorithm and propose a novel adaptive edge‐based interpolation algorithm, which use both 2‐D texture entropy and directional gradient to eliminate the distortion. It turns out that this method can effectively improve the image quality.