关键词: 低照度图像增强, 双边滤波, 图像分解, 色调映射

Abstract:

In low light conditions, images usually have low visibility. In order to enhance weakly illumination image, a fast enhancement method based on global adaptive tone mapping is proposed. The image is transformed from RGB color space to YUV color space, and the brightness channel is bilaterally filtered to obtain the basic layer and detail layer. This paper sets adaptive global tone mapping to the basic layer image, and adds the detail layer image information. This paper restores the image color saturation and reconverts to RGB space. The algorithm can quickly enhance the image with better enhancement effect, especially for low-pixel images with large area.

Key words: weakly illumination image enhancement, bilateral filtering, image decomposition, tone mapping