Abstract
A three-dimensional (3-D) measurement method for large-scale bending plates is presented. The proposed method, which combines the advantages of laser and a vision measurement method, makes use of a 3-D scanner, a texture projector, and a laser total station. The 3-D scanner is used to measure multiple partial sections of a large-scale bending plate, the texture projector is used to project a textured pattern onto the bending plate to perform alignment, and the total station is used to correct the aligned result to obtain more accurate 3-D data. The performance and effectiveness are evaluated by experiments. © The Authors. Published by SPIE under a Creative Commons Attribution 3.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI. (DOI: 10.1117/1.JEI.24.1.013001)
Highlights
Three-dimensional (3-D) shape measurement of objects is very important in numerous applicative fields including industrial manufacturing, medical science, computer science, civil engineering, game production, and film-making
Our goal is to deal with the problem of 3-D measurement for large-scale texture-less bending plates used in industrial manufacturing
The configuration is composed of one Epson EB-C1020XN video projector to generate vertical and horizontal black and white striped light patterns and two Cannon 600d single lens reflex (SLR) cameras to capture the images of the surface under structured lighting
Summary
Three-dimensional (3-D) shape measurement of objects is very important in numerous applicative fields including industrial manufacturing, medical science, computer science, civil engineering, game production, and film-making. Measuring the 3-D shape of an object, especially a large-scale object, is a complicated process in which a variety of problems are simultaneously present. Passive methods do not interfere with the measured object and only use a sensor to measure the radiance reflected or emitted by the object’s surface to infer its 3-D structure. Many passive methods are presented, and some of them can acquire the 3-D data of large scenes[1,2,3,4] using feature-based alignment strategy. The measured objects in industrial manufacturing are usually texture-less. Passive methods are difficult to use in industrial manufacturing
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