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FlexiCurve: Flexible Piecewise Curves Estimation for Photo Retouching

Chongyi Li1* Chunle Guo2* Shangchen Zhou1 Qiming Ai1 Ruicheng Feng1 Chen Change Loy1†

1S-Lab, Nanyang Technological University 2VCIP, CS, Nankai University

Introduction

Contributions

  • We present an approach that performs photo retouching by piecewise curves estimation through a deep network.
  • We explain how piecewise adjustment curves can be designed as the network’s output.
  • We devise a theoretically sound method, modeling the spatial dependencies among multiple estimations, to cope with diverse and heterogeneous regions in images, producing visually pleasing results both globally and locally.

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Code, data and models are available at https://li-chongyi.github.io/FlexiCurve/

Overview

Quantitative Comparisons

Visual Comparisons

PNG Curves