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基于红外面阵扫描图像的配准和融合
引用本文:李冰,李范鸣,谢江荣,石永彪.基于红外面阵扫描图像的配准和融合[J].激光与红外,2017,47(2):246-251.
作者姓名:李冰  李范鸣  谢江荣  石永彪
作者单位:中国科学院上海技术物理研究所,上海 200083;中国科学院大学,北京 100049; 中国科学院红外探测器与成像技术重点实验室,上海 200083
基金项目:国家十二五预研项目(No.41101050501);上海市现场物证重点实验室基金项目(No.2011xcwzk04)资助
摘    要:针对红外面阵扫描图像的连续拼接,提出了一种基于灰度特征的配准和融合算法。该算法首先利用Harris算子对待拼接图像的特定区域进行角点检测,并提出了一种自适应阈值方法,用于提取特征明显的兴趣点,同时限定兴趣点的个数;其次选择合适的窗口大小,利用互相关归一化(NCC)函数,对拼接图像兴趣点邻域灰度范围进行图像匹配,获得图像变换关系;最后提出了一种基于双线性变换和渐入渐出相结合的图像融合算法。结果表明,自适应阈值角点检测后的兴趣点特征明显,分布均匀且数目被阈值很好地约束,图像配准精度高,采用本文融合算法后的拼接图像,重叠区域过度平缓,不存在拼接缝和灰度跳变现象。

关 键 词:红外面阵扫描  Harris  角点检测  自适应阈值  NCC匹配  双线性插值

Image registration and fusion based on infrared array scanning detector
LI Bing,LI Fan-ming,XIE Jiang-rong,SHI Yong-biao.Image registration and fusion based on infrared array scanning detector[J].Laser & Infrared,2017,47(2):246-251.
Authors:LI Bing  LI Fan-ming  XIE Jiang-rong  SHI Yong-biao
Affiliation:The Shanghai Institute of Technical Physics,Chinese Academy of Sciences,Shanghai 200083,China;University of Chinese Academy of Sciences,Beijing 100049,China;Key Laboratory of Infrared System Detection and Imaging Technology,Chinese Academy of Sciences,Shanghai 200083,China
Abstract:An image registration and fusion algorithm based on gray feature was proposed for sequence infrared array scanning images. Firstly,the corner points were detected by Harris algorithm in the selected region,and an adaptive threshold algorithm was proposed to extract interesting points with obvious features and limit the number of the corner points; secondly,an appropriate window was selected,and then the images were matched by the normalized cross correlation (NCC) algorithm in neighbourhood gray range of interesting points and the transform relation between them was obtained; finally,an image fusion algorithm based on bilinear interpolation algorithm and gradated in-and-out amalgamation algorithm was proposed. The results show that the interesting points after the corner detection with adaptive threshold have obvious features and uniform distribution,and at the same time,the numbers of the corner points are well limited. The images using the algorithm have accurate matching ability,and the final fusion image has smooth transition without evident seams and gray jump phenomenon.
Keywords:infrared array scan  Harris algorithm  adaptive threshold  normalized cross correlation (NCC) algorithm  bilinear interpolation
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