三维激光扫描技术在轮船上层建筑旧改设计中的应用

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中图分类号：TQ018;TP391 文献标识码：A 文章编号：1001-5922（2025）10-0183-04

The application of three-dimensional laser scanning technology in the old design of ship superstructures

QIANYachao1，YITianqi1，WENJianliang²，HELiuming 2 . WANG Yawen²，GE Jiacheng1，2 （1.Yuan Yuzhi Digital Shenzhen Technology Co.，Ltd.，Shenzhen 5181O9，Guangdong China; Shenzhen China Merchants Real Estate Co.，Ltd.，Shenzhen 518O65，Guangdong China）

Abstract： Inorderto improve thequalityof theold designofthe ship superstructure，basedon the pointcloud data of theship superstructure based on3D laser scanning，a crack feature extraction method of the ship superstructure based on the improved K nearest neighbor（KNN） algorithm is proposed.Firstly，the improved KNN algorithm is proposed bycombining binomial functionand Euclidean distance as thesimilarity measure of KNN algorithm. Then，the improved KNNalgorithm isused to extract the crack characteristics of the superstructure of the ship，and the simulation test is carried out.Theresults show that this methodcan efectivelyextractthearea，lengthand maximum width of the cracks inthe superstructureof the ship，and the absolute error and relative error are 12.35% and （20 3.51% respectively. Compared with the feature extraction algorithms such as approximate curvature and normal vector， it is closer to the actual measurement results.

Key words： ship superstructure;3D laser scanning;KNN algorithm;crack extraction

实现轮船上层建筑裂缝修复的前提是对裂缝特征进行提取。（剩余5615字）