Rapid HDR image tone mapping method

The embodiment of the invention discloses a rapid HDR image tone mapping algorithm. According to the algorithm, a color HDR image is converted into a brightness image, and then truncation and normalization processing is carried out. And then the brightness image is transformed by using different power functions to enhance details of the dark area and the bright area. And finally, the transformed images are fused, the color information of the images is recovered, and Gamma correction is performed. The algorithm has the characteristics of simplicity, quickness and good effect, so that the HDR image after tone mapping can be well displayed in the current low-dynamic range display equipment, and in addition, the method is also suitable for detail enhancement of dark areas and bright areas of HDR videos and common images. 本发明实施例公开了一种快速的HDR图像色调映射算法。该算法先将彩色HDR图像转换为亮度图像，接着进行截断和归一化处理。然后分别利用不同的幂函数对亮度图像进行变换，以增强暗区和亮区区域的细节。最后将变换后的图像进行融合，恢复图像颜色信息，再Gamma纠正。该算法具有简单快速，效果好的特点，使得色调映射后的HDR图像能够很好地在目前低动态范围显示设备显示，此外本发明也适用于HDR视频和普通图