Three-dimensional measurement of multiple points using a TV camera with circular shifting apparatus

Kikuhito Kawasue; Yuichiro Ohya

doi:10.1117/12.424899

13 April 2001 Three-dimensional measurement of multiple points using a TV camera with circular shifting apparatus

Kikuhito Kawasue, Yuichiro Ohya

Proceedings Volume 4298, Three-Dimensional Image Capture and Applications IV; (2001) https://doi.org/10.1117/12.424899
Event: Photonics West 2001 - Electronic Imaging, 2001, San Jose, CA, United States

Abstract

By setting a refractor with a certain angle against the optical axis of the CCD camera lens, the image of a measuring point recorded on the image plane is displaced by the corresponding amounts related to the distance between the camera and the measuring point. When the refractor that keeps the angle against the optical axis is rotated physically at high speed during the exposure of the camera, the image of a measuring point draws a circular streak. Since the size of the circular streak is inversely proportional to the distance between the camera and the measuring point, the 3D position of the measuring point can be obtained by processing the streak. When the measuring point is moving against the camera, the measuring point draws a spiral streak on an image plane since the circular shift is added to the movement of the measuring point. The size of the spiral streak also concerns to the depth of the measuring point. The pitch of the spiral streak concerns to the velocity parallel to the image plane of the camera and the variation rate of the spiral size concerns to the velocity in the direction of the optical axis of the camera.

Citation Download Citation

Kikuhito Kawasue and Yuichiro Ohya "Three-dimensional measurement of multiple points using a TV camera with circular shifting apparatus", Proc. SPIE 4298, Three-Dimensional Image Capture and Applications IV, (13 April 2001); https://doi.org/10.1117/12.424899

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available