Research On Calibration Method Of Airborne Lidar

The purpose of this paper is on the entire airborne laser radar system(LiDAR)performed calibration,get placed each component parameter errors between the onboard systems to improve the accuracy of the point cloud.Currently,most original LIDAR measurements calibration techniques are based on experience,requiring the use of the system,or through the establishment of the venue on the ground to carry out the calibration.But it is difficult to obtain for the average user,there is an urgent need for a new approach more adaptable to meet the needs.Research methods in this paper,first introduced the airborne laser radar system deviation of the various effects of laser point cloud,also received an adjacent monitoring model aircraft with a difference equations based on the positioning pin point the laser,this model is included placement parameters and error components,with three translational and one rotational angle amount to simulate expression.Then use the optimized ICP method established between the two aircraft with conjugate correspondence between primitives,through this research method,draw text obtained research results that achieve the two aircraft with registration rigid conversion matrix.The matrix element is expressed by the outer direction cosine azimuth composition,which can solve for translating between aircraft with rotation varying amounts.Finally,the translation,rotation relationship used in parallel with the difference in the overlapping monitoring model aircraft,airborne radar systems to obtain placement parameter error,with application of the results to all aircraft completed calibration.Methods mentioned in the article in the experimental part of the complete statement,and the results were evaluated relative to absolute accuracy and precision,to verify the effectiveness of the algorithm,a mathematical model to verify the results of this paper to solve the placement parameter deviations conclusions.