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红外图像的变分增强算法

Keywords: 红外图像图像增强变分全变差直方图

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Abstract:

提出了一种基于全变差和对比度的红外图像变分增强方法.针对红外图像噪声较大的特点,在现有变分增强算法的基础上,构造目标梯度场时,事先考虑了对噪声的限幅,防止不必要的噪声放大.另外,构造目标函数时加入了图像的全变差(TV)约束,使得噪声进一步得到抑制.直方图类算法会对灰度邻近、分布较少的灰度阶进行合并,从而丢失一些有用细节,本算法不会出现直方图算法的类似问题.实验表明本算法相对于常见的直方图处理算法,可以更有效增强红外图像。

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[14]  这是一种简单的近似,也可将现有一些判断噪声的算法应用进来,本文仅使用[7,8]里这种简单的方法进行初步限幅.
[15]  源图像下载自http://www.pmo.jsinfo.net/wenben/2005/liangtu.htm,源图为彩色图,实验之前将其转换成了灰度图像.

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