2020/05/31 by Feifan Lv, Bo Liu, Lv, Feifan +3 · 5 citations
Computer Science · Physics and Astronomy · #Advanced Vision and Imaging #Artificial intelligence #Brightness #Color Science and Applications #Color constancy #Computer science #Computer vision #Contrast (vision) #Contrast enhancement #Convolutional neural network #Gamma correction #Image (mathematics) #Image Enhancement Techniques #Noise (video) #Optics #Pattern recognition (psychology) #Pixel #cs.CV
paper · pdf · doi:10.48550/arxiv.2006.00439
published in arXiv (Cornell University) (Cornell University) · 9 pages, 12 figures, 2 tables
arxiv created 2020/05/31 · openalex publication_date 2020/05/31 · arxiv updated 2020/06/02 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/08
This paper proposes a new light-weight convolutional neural network (5k parameters) for non-uniform illumination image enhancement to handle color, exposure, contrast, noise and artifacts, etc., simultaneously and effectively. More concretely, the input image is first enhanced using Retinex model from dual different aspects (enhancing under-exposure and suppressing over-exposure), respectively. Then, these two enhanced results and the original image are fused to obtain an image with satisfactory brightness, contrast and details. Finally, the extra noise and compression artifacts are removed to get the final result. To train this network, we propose a semi-supervised retouching solution and construct a new dataset (82k images) contains various scenes and light conditions. Our model can enhance 0.5 mega-pixel (like 600*800) images in real time (50 fps), which is faster than existing enhancement methods. Extensive experiments show that our solution is fast and effective to deal with non-uniform illumination images.