The technology and intelligent development of 3D line cloud reconstruc-tion from multiple images
As a collection of line segments,3D line clouds shave distinct geometric structures and semantic information in each individual feature.They can serve as efficient guiding,controlling,and abstract representation elements in structured 3D re-construction,compensating for the deficiencies in edge description and lack of initial structure in point clouds.These line clouds represent important structured features that can change the traditional"one-layer skin"3D model(where different objects are mutually adherent,making spatial analysis and decision-making difficult).However,how to reconstruct useful line clouds from multi-view images and make effective use of them has always been a challenging problem in this field.This article reviews the development of 3D line clouds,introduces related reconstruction methods,and analyzes existing difficulties and shortcom-ings.Combining the background of transformation from digitization to intelligent surveying and mapping technology,it discus-ses the three questions of what to build,how to build,and how to use line clouds in real-world 3D scenarios.The article also introduces and prospects the intelligent development of line cloud reconstruction and application,hoping to provide a reference for researchers working on real 3D reconstruction and line clouds.
3D line clouds3D realistic scene3D reconstructionintelligent surveying and mappingmultiple images
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