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Indexed by:期刊论文

Date of Publication:2016-10-01

Journal:MEASUREMENT

Included Journals:SCIE、EI、Scopus

Volume:92

Page Number:382-390

ISSN No.:0263-2241

Key Words:Point cloud data; Data extraction; Scan-tracking measurement; Bi-Akima spline interpolation

Abstract:Point cloud data extraction is an important process in scan-tracking measurement. In this paper, a new method of on-line three-dimensional point cloud data extraction for scan-tracking measurement is proposed for reducing extremely dense sampled data while maintaining data accuracy during the real-time scan-tracking measuring process. It is inspired from sketch paintings: First outlining the broad contour of the curve and then revising local details till the interpolated curve satisfies the required accuracy. This method adopts bi-Akima spline interpolation for connecting acquired points in NC machining or for point data fitting in reverse engineering. It can reduce efficiently the amount of point data with a smaller data reduction ratio and a smoother machined/fitted surface than conventional three-dimensional chordal method. (C) 2016 Elsevier Ltd. All rights reserved.