Title: LR3M: Robust Low-Light Enhancement via Low-Rank Regularized Retinex Model
Authors: Ren, Xutong
Yang, Wenhan
Cheng, Wen-Huang
Liu, Jiaying
電子工程學系及電子研究所
Department of Electronics Engineering and Institute of Electronics
Keywords: Lighting;Robustness;Noise reduction;Histograms;Minimization;Visualization;Estimation;Low-light enhancement;denoising;retinex model;low-rank decomposition
Issue Date: 1-Jan-2020
Abstract: Noise causes unpleasant visual effects in low-light image/video enhancement. In this paper, we aim to make the enhancement model and method aware of noise in the whole process. To deal with heavy noise which is not handled in previous methods, we introduce a robust low-light enhancement approach, aiming at well enhancing low-light images/videos and suppressing intensive noise jointly. Our method is based on the proposed Low-Rank Regularized Retinex Model (LR3M), which is the first to inject low-rank prior into a Retinex decomposition process to suppress noise in the reflectance map. Our method estimates a piece-wise smoothed illumination and a noise-suppressed reflectance sequentially, avoiding remaining noise in the illumination and reflectance maps which are usually presented in alternative decomposition methods. After getting the estimated illumination and reflectance, we adjust the illumination layer and generate our enhancement result. Furthermore, we apply our LR3M to video low-light enhancement. We consider inter-frame coherence of illumination maps and find similar patches through reflectance maps of successive frames to form the low-rank prior to make use of temporal correspondence. Our method performs well for a wide variety of images and videos, and achieves better quality both in enhancing and denoising, compared with the state-of-the-art methods.
URI: http://dx.doi.org/10.1109/TIP.2020.2984098
http://hdl.handle.net/11536/154347
ISSN: 1057-7149
DOI: 10.1109/TIP.2020.2984098
Journal: IEEE TRANSACTIONS ON IMAGE PROCESSING
Volume: 29
Begin Page: 5862
End Page: 5876
Appears in Collections:Articles