Self-calibration method for eccentric angle in hyperspectral and LiDAR integrated airborne system

摘要: Eccentric angle between IMU and the collimation axis of airborne sensor is one main reasons causing geometric correction error. Currently, application hyperspectral LIDAR integrated system are greatly affected by lack universal calibration methods which can calibrate data LiDAR simultaneously. An eccentric model for proposed, meanwhile a self-calibration method using “#” shaped flight strip designed to validate new model. Firstly, homogeneous points searched from all geometrically corrected strips automatic matching methods. Secondly, control obtained averaging coordinates applied solve get angle. Finally, point clouds with solved angle, then above steps repeated until angles stable. experiment was carried testify resolving method, shows that proposed high-precision, validity fast convergence. The sensors acquire plane precision 0.807 m (about 1.2 pixels) without any ground points, 0.437 elevation 0.15m.