A Point Cloud Error Correction Method Based on Mobile 3D Laser Scanning
A technology of laser scanning and error correction, applied in the direction of using optical devices, instruments, measuring devices, etc., can solve problems such as errors, increased system costs, and operation and maintenance costs, and achieve high precision, fast speed, and meet the needs of tunnel convergence measurement Effect
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[0036] The present invention will be further described below in conjunction with accompanying drawing, and the principle of the present invention is very clear to those skilled in the art. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0037] The present invention provides a point cloud error correction method based on mobile 3D laser scanning, the specific process is as follows:
[0038] A. Pre-processing preparation: Combine the odometer and the spiral scanning mode of the 3D laser scanner for push-brooming to obtain a 3D point cloud. Each ring is along the central axis, and combined with image filling, gray level smoothing and gray level linear stretching enhancement algorithms, Generate a tunnel tile map;
[0039] B. Based on the unfolded tunnel tile map, solve the actual azimuth cα3 of the center of the capping block in the measurement coordinate system, and correc...
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