A Low Cost Three-dimensional Vision System Using Space-encoded Spot Projections

Keith K. Yeung; Peter D. Lawrence

doi:10.1117/12.937836

22 January 1987 A Low Cost Three-dimensional Vision System Using Space-encoded Spot Projections

Keith K. Yeung, Peter D. Lawrence

Proceedings Volume 0728, Optics, Illumination, and Image Sensing for Machine Vision; (1987) https://doi.org/10.1117/12.937836
Event: Cambridge Symposium_Intelligent Robotics Systems, 1986, Cambridge, MA, United States

Abstract

The vision system described in this paper was developed to digitize the contours of smooth, featureless, curved surfaces, such as aircraft wing surfaces. The information will be used by a maintenance robot to carry out automated ultrasonic material testing on the surfaces. The vision system uses a light spot projector and video camera in a structured-light technique. This employs a 32x32 array of illuminated spots which is first projected onto the measurement surface and then followed by a set of five binary space-encoded patterns to identify the column addresses of the spots. The images of the spot patterns are captured by the video camera. Two surface reconstruction algorithms, nearest neighbour and thin plate model, are implemented to fit a surface to the scattered amplitude samples obtained by the spot projection system.

Citation Download Citation

Keith K. Yeung and Peter D. Lawrence "A Low Cost Three-dimensional Vision System Using Space-encoded Spot Projections", Proc. SPIE 0728, Optics, Illumination, and Image Sensing for Machine Vision, (22 January 1987); https://doi.org/10.1117/12.937836

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