A modified algorithm of histogramequalization to gray image manipulation was discussed and actualized by analyzing principia and deficiency of the traditional algorithm of gray image.
分析了传统灰度图像直方图均衡化算法的不足，讨论并实现了一种改进的直方图均衡化图像增强算法。
2
As the traditional algorithms for local histogramequalization is used to enhance the contrast of an image, the output brightness is always regardless of the input image.
现有的局部直方图均衡算法用于图像的对比度增强时，输出图像的亮度与输入图像无关。
3
To better understanding the weld image, the histogramequalization method was used aiming at enlarging the difference between groove and other area.