Automatic Tie Point Matching of Aerial Images Acquired by LiDAR System

Abstract

Abstract:

Aerial images tie points matching is conducted with the assistance of LiDAR points and POS data. Fast searching algorithm for obtaining conjugate point in correlation matching is devised. An automatic boresight misalignment calibration method based on virtual ground control points is adopted, on base of which the searching range of image matching is adaptively determined. The experimental results indicate that the fast searching algorithm proposed in this paper can reduce 20% of the matching time while ensuring the matching correctness. The camera boresight misalignment calibration method can effectively refine the accuracy of exterior orientation elements of images derived from POS data, and significantly improve the precision of predicted point position for tie points matching. The matching algorithm proposed in this paper can process multi-scale, multi-angle, cross-flight aerial images and obtain a high matching accuracy.

Key words: Arial Image, Tie Point Matching, Fast Correlation Match, Boresight Misalignment, LiDAR

CLC Number:

P237

References

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