南京大学学报(自然科学版) ›› 2011, Vol. 47 ›› Issue (4): 426431.
谢志华12**,刘国栋1,伍世虔2 ,方志军2,卢宇2
Xie Zhi一Hua12 ,Liu Guo Dong 1 ,Wu Shi一Qian2 ,Fanh Zhi一Jun2,Lu Yu2
摘要: 为了减小环境温度对红外人脸图像的影响,木文提出了一种基于统计回归模型的红外人脸温度归一化方法.为了得到环境温度与红外人脸温谱图在对应像素点灰度之间的关系,将环境温度改变值
和对应人脸上的温度变化值作为研究对象,利用统计回归方法对这两个对象进行二次多项式拟合即可得到环境温度变化和对应的人脸上温度变化的函数关系.通过得到的函数关系,建立归一化模型对红外
图像进行温度归一化处理,减小环境温度对红外人脸识别的影响.实验结果表明:相对于归一化前的图像,温度归一化后的红外人脸图像与参考图像之间的信噪比有了明显改善,木文提出的归一化方法提高了红外人脸识别识别率.
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