Unspervised Low-Light Inage Enhancement Based On Deep Lightness And Grey Pixel Estimation

• Published in: 2023 International Conference on Wavelet Analysis and Pattern Recognition (ICWAPR) pp. 26 - 31
• Main Authors: Zhang, Houwang, Li, Wangmeng, Chan, Leanne Lai-Hang
• Format: Conference Proceeding
• Language: English
• Published: IEEE 09.07.2023
• Subjects: Color constancy; Convolutional neural network; Grey pixel; Low-light image enhancement; Unsupervised deep learning
• ISSN: 2158-5709
• DOI: 10.1109/ICWAPR58546.2023.10337307

Images captured under low-light conditions often suffer from inadequate lightness and low color contrast, resulting in reduced performance of computer vision-related applications. In this work, we propose an unsupervised network for enhancing low-light images, which enhances the lightness and color constancy of images. To achieve this, we introduce two sub-modules, LC-Net and GP-Net, which estimate high-order curves for lightness enhancement and gray pixels for color constancy, respectively. The proposed method shows promising results in improving the quality of low-light images. To further enhance the information reasoning capability of our proposed method, we adopt an attention block that combines channel and space attention as a basic unit for the network. We evaluate the performance of our method quantitatively and visually in comparison to other existing low-light image enhancement techniques through experiments, the results indicate our method can outperform other approaches greatly in terms of color fidelity and lightness enhancement.