Traditional histogram equalization and gray-scale transformation algorithms can't realize the enhancement of the target in the infrared image effectively.

传统的直方图均衡和灰度变换增强算法，不能针对红外图像的目标进行有效地增强。

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A modified algorithm of histogram equalization 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。

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To better understanding the weld image, the histogram equalization method was used aiming at enlarging the difference between groove and other area.

运用直方图均衡化方法强化坡口与非坡口的差别，增加焊缝图像的理解性。

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