High-accuracy and real-time shape measurement using whole-space tabulation board

Akihiro Masaya; Motoharu Fujigaki; Ryosuke Murakami; Yoshiharu Morimoto

doi:10.1117/12.854701

14 April 2010 High-accuracy and real-time shape measurement using whole-space tabulation board

Akihiro Masaya, Motoharu Fujigaki, Ryosuke Murakami, Yoshiharu Morimoto

Proceedings Volume 7522, Fourth International Conference on Experimental Mechanics; 75224O (2010) https://doi.org/10.1117/12.854701
Event: Fourth International Conference on Experimental Mechanics, 2009, Singapore, Singapore

Abstract

A whole-space tabulation method (WSTM) is a technique to relate phase of projected grating with coordinates of the corresponded point pixel by pixel. The relation data are stored in a table. Even if there is a lens distortion of the projected grating, the WSTM can measure the shape of an object with high-accuracy. Even if a grating pitch is not equal, the WSTM can measure it with high-accuracy. And the analysis speed is very high because this method performs no calculation. The WSTM is, therefore, very useful for shape measurement. But, this method needs huge memory. It is possible to use the WSTM using a personal computer if the pixel size is small. It is necessary to reduce the pixel size of the image in the case of using a general personal computer. In this paper, a memory board for WSTM was developed to analyze shape with full size of an image. An experiment to evaluate this memory board was performed. This board has two set of a field programmable gate array (FPGA). The analysis speed of shape measurement using the memory board does not depend on a speed of a personal computer. The accuracy of shape measurement using the memory board and using software was almost same. The analysis speed using the memory board was faster than using software.

Citation Download Citation

Akihiro Masaya, Motoharu Fujigaki, Ryosuke Murakami, and Yoshiharu Morimoto "High-accuracy and real-time shape measurement using whole-space tabulation board", Proc. SPIE 7522, Fourth International Conference on Experimental Mechanics, 75224O (14 April 2010); https://doi.org/10.1117/12.854701

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

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
7 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Field programmable gate arrays

Calibration

CCD cameras

Phase shifts

Projection systems

Distortion

LCDs

Show All Keywords

Keywords/Phrases

Search In:

Publication Years