Low-Illuminated Image Enhancement Using Power Law Transformation and Image Fusion

In this paper, a low-illuminated image enhancement method is studied by using power law transformation (PLT) and image fusion. First, the PLT is used to enhance image. However, the exponent of PLT is difficult to be chosen such that all objects on image have good enhanced qualities. So, an image fusion method is then presented to combine the PLT enhanced images with various exponents to obtain the final image. In the experiments, the backlighting and nighttime images are used to demonstrate the effectiveness of the proposed method.