一种红外图像对比度增强的小波变换法  

APPROACH TO ENHANCE CONTRAST OF INFRARED IMAGE BASED ON WAVELET TRANSFORM

作　　者：张长江[1] 付梦印[1] 金梅[2] 张启鸿[1] 

机构地区：[1]北京理工大学信息科学技术学院自动控制系,北京100081 [2]大庆石油学院电气信息工程学院,黑龙江大庆163318

出　　处：《红外与毫米波学报》2004年第2期119-124,共6页Journal of Infrared and Millimeter Waves

基　　金：国防兵器预研基金资助项目 (4 2 0 0 10 70 3 0 4)

摘　　要：提出一种基于离散平稳小波变换和非线性增益的红外图像对比度增强方法 .对红外图像进行离散平稳小波变换后 ,对分辨率较好的各高频子带直接利用所提出的去噪方法去噪 ;对分辨率较差的各高频子带利用所提出的非线性增益法结合文中的去噪法进行增强 ;并给出一种评价增强图象质量的准则 .实验结果表明 ,本文提出的方法在有效的增强红外图像对比度的同时 ,又能很好的抑制红外图像中相关噪声。A new method to enhance the contrast of infrared image was given, which was based on discrete stationary wavelet transform and non-linear gain. After making discrete stationary wavelet transform to an infrared image, de-noising is done in the high frequency sub-bands with better resolution. Enhancement effect is obvious by combining de-noising method with non-linear gain method in the high frequency sub-bands with worse resolution. A new criterion to evaluate quality of image was given. Experimental results show that the new method can reduce colored noise, additive gauss white noise and speckle noise in infrared image effectively while it also enhances the contrast of infrared image well.

关 键 词：红外图像 平稳小波变换 广义交叉确认 阈值去噪 对比度增强 非线性增益 

分 类 号：TN216[电子电信—物理电子学]