能够将图片进行双向直方图均衡化，该方法通过对图像直方图动态分区,独立地进行各个分区的直方图均衡,并均衡了灰度间距,具有很强的适应性和稳定性。经过测试,在不同类型的图像中,该方法在视觉上和量化指标评估上都得到了较好的增强效果。-To the image histogram double equalization, the method through of image histogram dynamic partitioning, independently of each partition of the histogram equalization, and balanced the gray space, has a strong adaptability and stability. After testing, in different types of images, the method in the visual and quantitative assessment of indicators have been better enhanced effect.