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随着对航天相机性能要求的逐渐提高,现在的测绘类和大部分非测绘类相机都要求具备测绘功能,由于内方位元素测试精度和稳定性影响相机摄影的成像精度,因此对其标定技术需作专门研究。对于测绘类相机的内方位元素测试,已经具有完善的测试技术;对于非测绘类相机,由于在系统集成时没有主点与中心像元的调试环节,导致有些非测绘类相机的光轴和视轴有较大偏差,不能准确利用主点作为测试起始点,此时用传统的最小二乘法计算其内方位元素会引入较大误差。因此本文对传统的计算方法进行改良,引入光轴偏心角度,提出适用于测绘类和非测绘类相机内方位元素计算的方法,很好地解决了相机的内方位元素测试问题,其实现精度能够满足现有相机几何参数标定需求。
With the gradual improvement of aerospace camera performance requirements, the current mapping class and most of the non-mapping cameras are required to have the mapping function. Because the accuracy and stability of the in-plane element test affect the imaging accuracy of the camera photography, Make a special study. For the mapping of the interior orientation elements of the camera test, already has a sound test technology; for non-mapping camera, the system integration without the main point of the center pixel debugging, resulting in some non-mapping camera optical axis and visual Axis deviation, can not accurately use the main point as the starting point of the test, this time using the traditional least squares method to calculate its internal elements will introduce greater error. Therefore, this paper improves the traditional calculation method, introduces the eccentric angle of the optical axis, puts forward the method which is suitable for the calculation of the azimuthal elements in the mapping and non-mapping cameras, and solves the problem of in-plane element testing of the camera well, Meet existing camera geometrical parameter calibration needs.