3D point cloud simplification method for 3D printing

The invention provides a 3D point cloud simplification method for 3D printing, belongs to the technical field of 3D printing, solves the problem that an existing point cloud simplification algorithm focuses on feature retention of a geometric salient region of a 3D model, and causes a cavity in a fl...

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Bibliographische Detailangaben
Hauptverfasser:	ZHANG ZANZAN, ZHANG SHENG, ZHANG CAI, WU YINGCHUN
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	ADDITIVE MANUFACTURING TECHNOLOGY ADDITIVE MANUFACTURING, i.e. MANUFACTURING OFTHREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVEAGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING,STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING PERFORMING OPERATIONS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	The invention provides a 3D point cloud simplification method for 3D printing, belongs to the technical field of 3D printing, solves the problem that an existing point cloud simplification algorithm focuses on feature retention of a geometric salient region of a 3D model, and causes a cavity in a flat region after data encapsulation, and establishes a feature evaluation function with compromise between sharpness and uniformity in a point cloud gradual change region. According to the feature threshold, realizing secondary classification of the slowly varying region; when points with high eigenvalues in a slowly varying region are simplified, a subspace hierarchical sampling algorithm based on octree division is provided, and the simplification rate can be effectively controlled while the simplification speed is increased; when points with low eigenvalues in a slowly varying region are simplified, a far and near point cyclic sampling algorithm is provided, and the uniformity of the points is ensured under a hig