为了提高光照条件变化下的图像增强效果,提出一种改进直方图均衡和Retinex算法的图像增强方法.对于待增强灰度图像,通过理想低通滤波获得图像低频分量,采用改进直方图均衡进行动态范围优化,利用引导图像滤波代替Retinex算法的高斯滤波对图像的高频分量进行估计,并对估计的结果进行线性放大处理.实验结果表明,相对单尺度和多尺度Retinex算法以及改进的直方图均衡化算法,提出的方法从主观和客观评价方面都获得了更好的图像增强效果,有效提高了图像的视觉效果和可懂度,并具有较强的鲁棒性.
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