A degradation model for simultaneous brightness and sharpness enhancement of low-light image

Although a large number of methods have been proposed for low-light image enhancement, there still remain challenges these to simultaneously achieve excellent sharpness/resolution, high calculation efficiency as well visual pleasure requirements. In this communication, we propose new enhancement method based on the degradation model overcome dilemma. Specifically, regard special inverse problem degradation, and then task is logically embedded in iterative back-projection (IBP) framework. Meanwhile, an adaptive gamma correction utilized adaptively adjust brightness, IBP framework transferred logarithmic domain instead spatial further acceleration. Besides, simple effective pre-processing strategy pre-enhance input while making enhanced clarify (or pleasure). Extensive experimental results public databases seven state-of-the-art benchmarks consistently demonstrate effectiveness both visually quantitatively.