NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY
发明人:
RI Shien,TSUDA Hiroshi
申请号：
WO2016JP70428
公开号：
WO2017029905(A1)
申请日:
2016.07.11
申请国别(地区):
世界知识产权组织国际局
年份:
2017
代理人:
摘要：
With regards to methods that use a plurality of cameras to measure out-of-plane displacement or three-dimensional displacement of an object, there are various practical problems such as accurate synchronization between cameras, the cost incurred by a plurality of camera devices, an increase in analysis time, and the inability to analyze outside the range that can be simultaneously imaged in images captured by two or more cameras. The present invention captures with a single digital (video) camera a grating marker that is attached or transferred to an object surface, and using the sampling moire method quantitatively finds by image processing the out-of-plane displacement amount from a minute change in the phase of the grating pitch in an image due to out-of-plane displacement. Also, the present invention similarly uses the sampling moire method to quantitatively find the out-of-plane/in-plane displacement amount from a minute change in the phase of the same grating due to in-plane/out-of-plane displacement, a
