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车载式被动红外探雷系统中,由于存在探测系统的主光轴与地面法线的夹角,热像仪所获取的图像存在着较大的畸变,影响了地雷探测的准确率。从图像畸变产生的原因入手,根据从物平面到像平面的坐标映射算法,在VC++6.0环境下实现了对畸变图像的矫正。实验结果表明,当红外热像仪置于2m高度,探测距离为20m时,矫正后图像与20m正视图像各对应像素点灰度值之差均小于8,具有相似性。本算法适用于红外探雷车辆的图像处理系统。
Because of the angle between the main optical axis of the detection system and the normal of the ground, the image acquired by the thermal imager in the vehicle-mounted passive infrared mine detection system has large distortion, which affects the accuracy of the mine detection. Starting from the reason of the image distortion, according to the coordinate mapping algorithm from the object plane to the image plane, the distortion image is corrected in VC ++ 6.0 environment. Experimental results show that when the thermal imager is placed at 2m height and the detection distance is 20m, the difference between the gray values of corresponding pixels in the corrected image and the 20m frontal image is less than 8, which is similar. The algorithm is suitable for infrared ray detection vehicle image processing system.