Proceedings of the Korean Society of Machine Tool Engineers Conference (한국공작기계학회:학술대회논문집)
- 2003.04a
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- Pages.255-259
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- 2003
A Study on the Calibration of Shape Measurement System Using Digital moire
Digital moire 형상측정 시스템의 보정에 관한 연구
Abstract
Moire topography method isa well-known non-contacting 3-D measurement method as afast non-contact test for three-dimension shape measuring method. Recently, it's important to study the automatic three-dimension measurement by moire topography because it is frequently applied to the reverse engineering , the medical , the entertainment fields. Three-dimension measurement using projection of moire topography is very attractive because of its high measuring speed and high sensitivity. In this paper, the classical moire method is computerized-so called digital moire when a virtual grating pattern is projected on a surface, the captured image by the CCD camera has three-dimension information of the objects. The moire image can be obtained through a simple image processing and a reference grating pattern. and it provides similar results without physical grating pattern. digital projection moire topography turn out to be very effective for the three-dimension measurement of objects. Using different N-bucket algorithm method of digital projection moire topography is tested to measuring object with the 2-ambiguity problem. Experimental results prove that the proposed scheme is capable of finding measurement errors that decreased more by using the four-three step algorithm method instead of the same step in the phase shifting of different pitch.
Keywords
- Non-contacting 3-D Measurement Method;
- Projection Moire Topography;
- Virtual Grating;
- Two-wavelength Method;
- Phase Shift
- 비접촉 3차원 측정법;
- 영사식 무아레 측정법;
- 가상격자;
- 2중 파장법;
- 위상이동;