Abstract: Aiming at the defect of low dynamic display device in high dynamic range image display, this paper proposes a high dynamic range image mapping technology through pixel grouping. This paper changes the image luminance using bilateral filtering, then groups them. According to the data’s average, it produces a gamma value to correct the image finally. The experiment shows that, the method not only can realize the dynamic range compression, but also can effectively avoid the phenomenon such as halo and chromatic aberration. It can be widely used in low dynamic range devices.

Key words: high dynamic range, bilateral filtering, grouping, gamma correction

摘要： 针对低动态显示设备严重制约高动态范围图像显示的缺点，提出了一种基于分组的高动态范围图像色调映射技术，利用双边滤波技术对图像亮度值进行初步校正，对所得数据进行分组，根据分组数据的平均值惟一确定一个伽马值对图像亮度进行最终修正。实验结果表明，该方法不仅能够实现动态范围压缩，而且能够有效避免光晕和色差等现象，可以广泛应用于各种低动态设备中。

关键词: 高动态范围图像, 双边滤波, 分组, 伽马校正