Hull complex planking point cloud frame line extraction method and device

Abstract

The embodiment of the invention discloses a hull complex planking point cloud frame line extraction method and device, and is used for solving the technical problems that the existing hull planking frame line extraction technology has the problems of high cost, low efficiency and low accuracy and restricts enhancement of the shipbuilding production efficiency. The method comprises the steps that a coordinate system of a target curved surface of target hull planking and a point cloud data curved surface of hull planking for processing obtained through scanning is unified; projection to an xoy plane is performed according to the frame line key points of the target curved surface of the target hull planking and a frame line reference point matrix is obtained; corresponding three-dimensional point cloud data are indexed on the point cloud data curved surface of the hull planking for processing according to the frame line reference point matrix so as to obtain the frame line reference point matrix of the hull planking for processing; and curve fitting is performed according to the three-dimensional coordinate points of the frame line reference point matrix of the hull planking for processing so as to obtain a frame line group of the hull planking for processing.

Description

technical field [0001] The invention relates to the field of feature line extraction in three-dimensional point cloud data, in particular to a method and device for extracting rib line from point cloud of complex outer plate of ship hull. Background technique [0002] The curved surface of the hull outer plate is a free-form surface with two-way curvature, which is generally formed by the water and fire bending process, but in the process of processing, it is necessary to judge the forming condition of the outer plate. The rib line of the hull plating has the function of describing the outline of the hull plating, so it is often used to measure the forming degree of the hull plating. In the process of processing, it is necessary to find the rib line on the surface of the processed outer plate first, and then compare it with the rib line on the target surface to make a forming judgment. Therefore, the extraction technology of the rib line of the machined surface of the hull ...

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides a method and device for extracting rib lines from the complex outer plate point cloud of the hull, which solves the problems of high cost, slow efficiency, and low precision in the existing techniques for extracting rib lines of hull outer plates, which restricts Technical Problems in the Improvement of Shipbuilding Production Efficiency

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