Authors
Jiwu Wang*, Bo Dai
School of Mechanical and Electronic Engineering, Beijing Jiaotong University,
Beijing, Haidian District, China
*Corresponding author. Email: [email protected]
Corresponding Author
Jiwu Wang
Received 11 October 2019, Accepted 4 June 2020, Available Online 15 September
2020.
DOI
https://doi.org/10.2991/jrnal.k.200909.014
Keywords
Measurement; single image with rectangular structure; vanishing points;
homography
Abstract
Image-based geometric measurement is getting more attention in machine
vision field due to its contact-less and low-cost characteristics. Here
the measurement of single image with the rectangular structure is studied,
in which only one side length of the rectangle is known, and the coordinates
of points in the measured plane are obtained. The intrinsic parameters
of the camera are calibrated firstly by using the three vanishing points
of mutually orthogonal directions. Then the homography between the image
plane and the model plane which the rectangle structure belongs to is derived,
and the plane measurement method of the latter is described in details.
Furthermore, the measurement experiment is done with the single image taken
by the camera, and the validity of the proposed method is verified by comparing
with real data.
Copyright
© 2020 The Authors. Published by ALife Robotics Corp. Ltd.
Open Access
This is an open access article distributed under the CC BY-NC 4.0 license
(http://creativecommons.org/licenses/by-nc/4.0/).