光子学报, 2009, 38 (12): 3318, 网络出版: 2010-05-10
一种基于非下采样Contourlet变换的运动点目标背景抑制算法
An Algorithm for Moving Point Target Background Suppression Based on NSCT
红外图象 目标检测 背景抑制 非下采样Contourlet变换 Infrared image Target detection Background suppression Nonsubsampled contourlet transform (NSCT)
摘要
为了解决机载红外预警探测系统检测地面运动点目标时的结构化背景抑制,提出了一种基于非下采样Contourlet变换的新算法.算法采用非下采样Contourlet变换对原始图像进行多层分解,然后对低频子带和高频子带采用不同的方法处理,最后对各子带进行重构即可得到背景抑制后图像.与数学形态学Top-hat算法比较,实验结果表明本文所提算法能有效地抑制图像背景,从而较好地提高图像的信噪比和对比度.
Abstract
A new infrared ground point background suppression algorithm based on the Nonsubsampled Contourlet Transform (NSCT) is presented.Raw image is decomposed using NSCT,different operators are adapted in different decomposition scales and directions,and background suppression image is obtained by NSCT reconstruction.When compared with conventional mathematical morphology Top-hat algorithm,several groups of experimental results demonstrate that the presented algorithm can suppress background effectively and the signal-noise ratio and contrast of image is improved efficiently.
秦翰林, 周慧鑫, 刘上乾, 杨廷梧. 一种基于非下采样Contourlet变换的运动点目标背景抑制算法[J]. 光子学报, 2009, 38(12): 3318. QIN Han-lin, ZHOU Hui-xin, LIU Shang-qian, YANG Ting-wu. An Algorithm for Moving Point Target Background Suppression Based on NSCT[J]. ACTA PHOTONICA SINICA, 2009, 38(12): 3318.
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