基于二代Curvelet变换的红外与可见光图像融合

针对红外与可见光成像传感器的物理特性,提出了一种基于二代Curvelet变换的图像融合算法.首先对原始图像分别进行快速离散Curvelet变换,得到不同尺度与方向下的子带系数.对低频子带系数,根据红外图像的目标特性与可见光图像的细节信息确定其融合权值;对不同尺度与方向下的高频子带系数,采用基于局部区域能量匹配的融合规则.最后经Curvelet逆变换得到融合结果.实验结果表明,该算法可以有效地综合可见光与红外图像中的重要信息,其融合结果较典型的基于塔式分解与基于小波变换的图像融合算法,在主观视觉效果与客观评价指标上均有所改善.

FUSION OF INFRARED AND VISIBLE IMAGES BASED ON THE SECOND GENERATION CURVELET TRANSFORM

Aiming at the physical characteristics of infrared and visible imaging sensors,a novel image fusion algorithm based on the second generation Curvelet transform was proposed.Firstly,the fast discrete Curvelet transform was performed on the original images respectively to obtain the subband coefficients at different scales and in various directions.Then for low frequency subband coefficients,the fusion weights were determined by the target characteristics of infrared image and the detail information of visibl...