ACCEPTED TO IEEE TIP 1 Mixed-Domain Edge-Aware Image Manipulation

Abstract—This paper gives a novel approach to edge-aware image manipulation. Our method processes a Gaussian pyramid from coarse to fine, and at each level, applies a nonlinear filter bank to the neighborhood of each pixel. Outputs of these spatially-varying filters are merged using global optimization. The optimization problem is solved using an explicit mixed-domain (real space and DCT transform space) solution, which is efficient, accurate, and easy-to-implement. We demonstrate applications of our method to a set of problems including detail and contrast manipulation, HDR compression, non-photorealistic rendering, and haze removal. Index Terms—mixed-domain, edge-aware image processing, optimization-based image processing, multi-scale method. I