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Filling method for unwanted holes in clouds of three dimension scanning

A point cloud and hole technology, which is applied in the field of point cloud hole filling in 3D scanning, can solve problems such as low efficiency, large amount of calculation, and poor approximation effect of discrete points.

Inactive Publication Date: 2008-04-23
HAIAN COUNTY SHENLING ELECTRICAL APPLIANCE MFG +1
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Problems solved by technology

Although this type of interpolation algorithm is relatively fast, it has its fatal shortcomings, namely: 1 can only deal with single-valued non-closed surfaces; 2 it must assume that the partial derivative vector is linearly distributed on the domain boundary curve; 3 the reconstructed surface depends on Because of the estimated partial derivative vector, the surface interpolation method is not good for the approximation of discrete points, and the calculation is large and the efficiency is low.

Method used

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  • Filling method for unwanted holes in clouds of three dimension scanning
  • Filling method for unwanted holes in clouds of three dimension scanning
  • Filling method for unwanted holes in clouds of three dimension scanning

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Embodiment Construction

[0044] A point cloud hole filling method based on 3D scanning of triangular Bezier surfaces:

[0045] Step 1: Set a triangle ABC around the point cloud hole and in the screen coordinate plane. The area of ​​the triangle ABC can make the projection of the point cloud hole and its surrounding points to the screen coordinate plane fall into the triangle ABC, and The point that the projection falls into the triangle ABC is used as the point P of the fitting surface when filling the hole s (s=0,1,...,m-1), according to the point P of the fitting surface s Projection P on the plane ABC of the triangle s ’ position to calculate its surface parameterized coordinates (u s , v s ,w s ), u s =(ΔAP s 'B area) / (ΔABC area), v s =(ΔAP s 'C area) / (ΔABC area), w s =(ΔB P s 'C area) / (ΔABC area), will fit the point P of the surface s (s=0,1,...,m-1) coordinates and its surface parameterized coordinates (u s , v s ,w s ) into the Bezier surface equation of degree n and the control p...

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Abstract

This invention discloses a filling up method for point-cloud holes of 3-D scanning based on a triangle domain Bessel curved face including a practicality model, 3-D data collection, data pre-process, re-structure and analysis of curve faces, fitting of the curved faces, moldeling of the CAD, data program and process, spare parts, measurement of database and CAD analog library. This invention can get a curved face with random points around accurate fit holes.

Description

technical field [0001] The invention relates to a method for repairing three-dimensional graphics, in particular to a method for filling holes in point clouds of three-dimensional scanning. Background technique [0002] Reverse engineering (Reverse Engineering, RE) technology is a new technology that appeared in the field of advanced manufacturing in the late 1980s. It generally includes four basic links: three-dimensional shape detection and conversion (obtaining physical data), data preprocessing (point Cloud processing, recognition, multi-view splicing), CAD model establishment (surface reconstruction), CAM parts forming, the basic flow chart is attached figure 1 shown. In the process of 3D shape detection and conversion, the 3D digital scanner is used to perform 3D rapid scanning measurement on the surface of the physical model, and the 3D discrete data of the product can be obtained under the premise of satisfying the discrete sampling speed and data quality. The inco...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T15/00
Inventor 达飞鹏朱春红
Owner HAIAN COUNTY SHENLING ELECTRICAL APPLIANCE MFG
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