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为实现高分辨雷达/红外成像复合制导系统的空间配准,首先提出了一种基于无偏转换测量的精确极大似然坐标变换法来完成由球坐标系到笛卡尔坐标系的坐标转换,然后提出了一种通过标定雷达和红外相机实现空间配准的方法。为提高空间配准的精度,用提出的坐标变换法估计目标在笛卡尔坐标系下的真实位置,在红外图像处理中提出了一种多灰度细分质心算法来求取图像中目标的精确位置。实验结果表明:该方法配准精度高,满足系统的精度要求。所提出的空间配准方法不仅适用于高分辨雷达/红外成像复合制导系统,还为其他异类传感器复合系统的空间配准提供了一种方法。
In order to realize spatial registration of high resolution radar / infrared imaging composite guidance system, a precise maximum likelihood transformation method based on unbiased translation measurement is proposed to complete the coordinate transformation from spherical coordinate system to Cartesian coordinate system, Then a method of spatial registration through calibration radar and infrared camera is proposed. In order to improve the accuracy of spatial registration, the proposed coordinate transformation method is used to estimate the true position of the target under the Cartesian coordinate system. In the infrared image processing, a multi-grayscale segmentation centroid algorithm is proposed to obtain the accurate target in the image position. Experimental results show that the proposed method has high registration accuracy and meets the accuracy requirements of the system. The proposed spatial registration method is not only suitable for high resolution radar / infrared imaging composite guidance system, but also provides a method for spatial registration of other heterogeneous sensor composite systems.