Training-free prior guided diffusion model for zero-reference low-light image enhancement

Kai Shang, Mingwen Shao, Chao Wang, Yuanjian Qiao, Yecong Wan

Abstract: Highlights•We explore four types of image priors to achieve zero-reference learning•We improve bright channel prior to effectively improve the brightness of image.•A training-free diffusion model guided by priors is meticulously designed.