热红外相机双目测距系统标定技术研究

Research on calibration technology of thermal infrared camera binocular ranging system

针对双目测距系统相机模型标定过程中,热红外相机与常用可见光相机的成像原理、图像质量、信噪比等存在的差异,对比了两种标定靶标:由黑色氧化铝板和镀镍铝板制成的棋盘格靶标、由黑色氧化铝板和镀镍钕铁磁制成的圆形点阵靶标,并分析了以上两者的标定结果。研究结果发现圆形点阵靶标相较棋盘格靶标误差更小,但两者的标定结果模型均具有较高的精度,可满足后续双目视觉的特征点匹配需求。本次研究对于双目视觉在热红外谱段中的应用具有一定的参考价值。

For the calibration of the binocular ranging system,there are differences between the thermal infrared camera and the visible light camera,such as imaging principle,image quality,and signal-to-noise ratio.To deal with the situation above,two calibration targets are compared:a checkerboard target made of black alumina plate and nickel-plated aluminum plate,a circular lattice target made of black alumina plate and nickel-plated neodymium magnet.The calibration results of the above two were analyzed.The results show that the circular lattice target has smaller error than the checkerboard target,but the calibration results of both models have acceptable precision,which can meet the feature matching requirements of subsequent binocular vision.This study has certain reference value for the application of binocular stereo vision in the thermal infrared spectrum.