Single Low-Light Image Enhancement by Fusing Multiple Sources

The visual quality of photographs can be seriously affected by various low-light conditions. The image enhancement methods based on fusion achieve satisfying results. However, this poses challenges to the situation that there are no fusion sources and only a single low-light image is at hand. In this paper, we propose a single low-light enhancement method by fusing multiple sources, including the original image and its intermediate enhancements generated by a simplified Retinex model. We combine these sources at a mid-level image representation based on a patch-based decomposition model. Compared with other state-of-the-art methods, visual and quantitative results show that our method effectively improves visual effects in terms of lightness, color harmony and vividness.