[논문]Low-Light Image Enhancement Using Volume-Based Subspace Analysis

Kim, Wonjun; Lee, Ryong; Park, Minwoo; Lee, Sang-Hwan; Choi, Myung-Seok

doi:10.1109/access.2020.3005249

[해외논문] Low-Light Image Enhancement Using Volume-Based Subspace Analysis 원문보기

IEEE access : practical research, open solutions, v.8, 2020년, pp.118370 - 118379

Kim, Wonjun (Konkuk University, Seoul, South Korea) , Lee, Ryong (Korea Institute of Science and Technology Information, Research Data Sharing Center, Daejeon, South Korea) , Park, Minwoo (Korea Institute of Science and Technology Information, Research Data Sharing Center, Daejeon, South Korea) , Lee, Sang-Hwan (Korea Institute of Science and Technology Information, Research Data Sharing Center, Daejeon, South Korea) , Choi, Myung-Seok (Korea Institute of Science and Technology Information, Research Data Sharing Center, Daejeon, South Korea)

Abstract ▼ AI-Helper

Low-light image enhancement is a key technique to overcome the quality degradation of photos taken under challenging illumination conditions. Even though the significant progress has been made for enhancing the poor visibility, the intrinsic noise amplified in low-light areas still remains as an obstacle for further improvement in visual quality. In this paper, a novel and simple method for low-light image enhancement is proposed. Specifically, the subspace, which has an ability to separately reveal illumination and noise, is constructed from a group of similar image patches, so-called volume, at each pixel position. Based on the principal energy analysis onto this volume-based subspace, the illumination component is accurately inferred from a given image while the unnecessary noise is simultaneously suppressed. This leads to clearly unveiling the underlying structure in low-light areas without loss of details. Experimental results show the efficiency and robustness of the proposed method for low-light image enhancement compared to state-of-the-art methods.

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