Contrast Enhanced Tone Mapping Operator for High Dynamic Range Image Based on Guided Image Filter

Abstract

n this paper, we propose a contrast enhancement algorithm using guided, image filter (GIF). The GIF is used, to divide an HDR image into a base layer and a detail layer. The energy scale of base layer determinate the darkness and brightness of the image. However, the detail information in the base layer is difficult to be displayed, because of the high brightness and clusters of low brightness. We propose a contrast enhancement method, by adjusting the gray level of base layer by subtracting the mean value of itself. It is combined, with the detail layer to preserve the detail information. Experiment results show that the proposed, algorithm has better performance in detail preservation and. contrast enhancement.