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基于引导滤波的Retinex快速夜间彩色图像增强技术

Keywords: Retinex,图像增强,色调、饱和度、亮度(HSV),引导滤波,夜间彩色图像

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Abstract:

针对目前基于Retinex原理的图像增强技术在对夜间彩色图像处理中存在颜色失真、在高对比度边缘区域存在"光晕伪影"等问题,提出了一种基于引导滤波的Retinex快速夜间彩色图像增强的算法.该算法首先构造优化的颜色恢复函数,然后对夜间彩色图像在色调、饱和度、亮度(hue,saturation,value,HSV)颜色空间下的亮度图像采用具有边缘保持功能的引导滤波进行平滑处理,估计场景的光照分量,进而获得仅包含物体本身特性的反射分量图像,经过Gamma校正与颜色恢复后最终实现夜间彩色图像增强.实验结果表明,本文提出的算法增强效果显著、效率较高,同时具有颜色保真、抑制过增强和能较好保留边缘细节信息等特性.

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