Measuring The Flutter Of Plane Model With Dynamic Shadow Moire Topography

1983 ◽  
Author(s):  
Wu Minda ◽  
Ni Shuhue
Keyword(s):  
Plane Model ◽  
Shadow Moire ◽  
Shadow Moiré ◽  
Moiré Topography

Colored Shadow Moiré Topography Using Colored Light Sources: Red, Green, and Blue

1994 ◽  
Vol 33 (Part 2, No. 11A) ◽  
pp. L1565-L1567 ◽  
Author(s):  
Jae Heung Jo ◽  
Keun Cheol Yuk ◽  
Soo Chang
Keyword(s):  
Light Sources ◽  
Shadow Moire ◽  
Shadow Moiré ◽  
Moiré Topography

Automatic shadow moiré topography: a moving-light-source method

1989 ◽  
Vol 14 (22) ◽  
pp. 1252 ◽  
Author(s):  
Jae Sun Lim ◽  
Jongsu Kim ◽  
Myung Sai Chung
Keyword(s):  
Light Source ◽  
Source Method ◽  
Shadow Moire ◽  
Shadow Moiré ◽  
Moiré Topography

Systematic errors in small deformations measured by use of shadow-moiré topography

2000 ◽  
Vol 39 (19) ◽  
pp. 3266 ◽  
Author(s):  
Hanif M. Ladak ◽  
Willem F. Decraemer ◽  
Joris J. J. Dirckx ◽  
W. Robert J. Funnell
Keyword(s):  
Systematic Errors ◽  
Shadow Moire ◽  
Shadow Moiré ◽  
Small Deformations ◽  
Moiré Topography

Application of Moiré Topography to small objects in palaeontology and sedimentology

1998 ◽  
Vol 135 (1) ◽  
pp. 93-99 ◽  
Author(s):  
WINFRIED HAAS
Keyword(s):  
Three Dimensional ◽  
Cost Effective ◽  
Geometric Optics ◽  
Shadow Moire ◽  
Shadow Moiré ◽  
Contour Lines ◽  
Dimensional Object ◽  
Moiré Topography

For contouring the relief of small palaeontological or sedimentological objects the method of Shadow Moiré Topography, already successfully applied in other fields, is recommended. When a whitened three-dimensional object is seen or photographed through a grating and the illumining light bundle passes through the same grating, equidistant planes of shadow can be produced. The latter generate contour lines on the object where they intersect its surface. The theory of Shadow Moiré Topography is explained by the principles of geometric optics. A simple and cost effective apparatus is proposed and examples of contoured objects are figured.

An accurate method to calibrate shadow moiré measurement sensitivity

2019 ◽  
Vol 30 (12) ◽  
pp. 125021
Author(s):  
Wei Zhang ◽  
Fulong Zhu ◽  
Shenghuai Wang ◽  
Pengyan Lu ◽  
Xin Wu
Keyword(s):  
Accurate Method ◽  
Measurement Sensitivity ◽  
Shadow Moire ◽  
Shadow Moiré

scholarly journals Shadow Moiré technique for postural assessment: qualitative assessment protocol by intra- and inter-rater evaluation

2017 ◽  
Vol 29 (2) ◽  
pp. 356-360
Author(s):  
José Nunes da Silva Filho ◽  
Luiz Alberto Batista ◽  
Jonas Lírio Gurgel ◽  
Flávia Porto
Keyword(s):  
Qualitative Assessment ◽  
Assessment Protocol ◽  
Shadow Moire ◽  
Shadow Moiré ◽  
Postural Assessment

scholarly journals Computer-automated shadow moiré method and applications for 3D surface profiling

2021 ◽  
Author(s):  
Rui Zhao
Keyword(s):  
Least Square ◽  
Automated System ◽  
Image Subtraction ◽  
Full Field ◽  
Surface Profiling ◽  
Shadow Moire ◽  
Shadow Moiré ◽  
3D Surface ◽  
Measurement Resolution ◽  
Moire Method

Among numerous methods for 3D surface profiling, classic shadow moiré method has been kept as the most popular one due to its full-field feature and low cost. This thesis focuses on a computer-vision shadow moiré method with a scope to improve the measurement resolution, accuracy and efficiency. The computer automation is basically realized through the introduction of a phase-shifting technique that is incorporated with a new multi-grid least-square unwrapping algorithm. The method is enhanced by implementing a few additional image processing techniques. These techniques, when implemented, result in improved measurement accuracy and enable easy applications to irregularly shaped surfaces. The study also proposes a new, automated system calibration approach that is based on a real-time image subtraction. A data normalization process is studied to resolve possible confusions in the presentation of the original data. The verification test results show that the modified shadow moiré technique has achieved the initial goal, in that the measurement resolution now reaches a few percentage of the fringe sensititivity.

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