Small Angle Moire Contouring

Kevin G. Harding; Mark Michniewicz; Albert Boehnlein

doi:10.1117/12.942874

12 March 1988 Small Angle Moire Contouring

Kevin G. Harding, Mark Michniewicz, Albert Boehnlein

Proceedings Volume 0850, Optics, Illumination, and Image Sensing for Machine Vision II; (1988) https://doi.org/10.1117/12.942874
Event: Advances in Intelligent Robotics Systems, 1987, Cambridge, CA, United States

Abstract

Moire contouring techniques have proven useful for a variety of application in which continuous curved surfaces have been of interest. However, traditional moire contouring has limitations when dealing with many surfaces which contain step changes in the height of the surface. In particular, the fringe data provided by the moire method has an ambiguity when there is a step change of more than the contour interval of the fringe, that is, when the step change is greater than one fringe. In this case, the fringe order (which fringe we are on) can be lost such that the absolute change in distance is unknown. Steps also cause a problem with shadows since the surface is illuminated at other than the viewing angle in order to obtain the triangulation effect used in moire contouring. This paper suggests some possible solutions to this problem, and describes a specific experiment aimed at overcoming these difficulties.

Citation Download Citation

Kevin G. Harding, Mark Michniewicz, and Albert Boehnlein "Small Angle Moire Contouring", Proc. SPIE 0850, Optics, Illumination, and Image Sensing for Machine Vision II, (12 March 1988); https://doi.org/10.1117/12.942874

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