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Robust and Accurate Surface
Measurement
Using Structured Light
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT, VOL. 57, NO. 6, JUNE 2008
Rongqian Yang, Sheng Cheng, Wei Yang, and Yazhu Chen
PPT 製作 100 %
Adviser : 謝銘原
Student: 謝琮閔
ID : M9820113
Outline
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Abstract
Introduction
System design
Structured light exaction and coding
procedure
• Experimental results
• Discussion and conclusion
Abstract
• 3-D surfaces using a binocular system
• Each structured light sheet is fitted to a
conicoid
• Zero-crossing detection algorithm with
Steger’s detector
• Linked line with the gray code to avoid
producing outliers caused by erroneous
decoding
INTRODUCTION
• Structured light measurement methods for 3D coordinate acquisition have been rapidly
developing and have been applied in various
domains.
• The accuracy of measurement is related to
the distortion of LCD projector lens and the
subpixel location of stripes.
INTRODUCTION
• Classic stereo vision system
• Steger’s curvilinear structure detection
method
• Gray code
• Dynamic threshold
• Per-pixel varying threshold and oversampling
INTRODUCTION
• Each structured light sheet is regarded as a
conicoid
• Ridgeline linking algorithm is also employed
to link the subpixel points in a stripe and
construct a data list
• Gray code separates the measurement area
into a great number of divisions