Edge-Guided Image Downscaling With Adaptive Filtering

Abstract

In this paper, we propose a novel framework for image downscaling with edge-guided interpolation and adaptive filtering. First, we extract the second derivative edge-guidance map from an input image. Then, inter-pixels are interpolated via edge-guidance map and portion of distance from the input pixels. Finally, adaptive filtering is applied to the expanded pixels for alleviating artifacts while preserving details and contents of input image. Experimental results validate the proposed framework can achieve content-preserving results while reducing artifacts.