Precise center location for light spot contour images of light emitting diode control points in light-pen vision coordinate measurement

Tingfa Xu; Peng Zhao

doi:10.1117/1.3041745

1 December 2008 Precise center location for light spot contour images of light emitting diode control points in light-pen vision coordinate measurement

Tingfa Xu, Peng Zhao

Author Affiliations +

Optical Engineering, Vol. 47, Issue 12, 123602 (December 2008). https://doi.org/10.1117/1.3041745

Abstract

In a light-pen single-camera three-dimensional (3-D) coordinate vision measurement system, a key step is the fast and precise center location for the light spot contour images of the LED control points obtained by the charge-coupled device (CCD)camera. A novel center location scheme for the light spot contour images is proposed in this key step. This scheme uses a geodesic active contour model to obtain every light spot's contour edge simultaneously. Then the center coordinate of every light spot is measured using a subpixel scheme. Compared to the common scheme using the edge detection and the contour tracking, this scheme is highly precise and fast for the center location of every light spot in a CCD image.

©(2008) Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation Download Citation

Tingfa Xu and Peng Zhao "Precise center location for light spot contour images of light emitting diode control points in light-pen vision coordinate measurement," Optical Engineering 47(12), 123602 (1 December 2008). https://doi.org/10.1117/1.3041745

Published: 1 December 2008

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