Application of digital hologram apodization for surface shape measurement methods

2006 ◽  
Author(s):  
R. Jóźwicki ◽  
J. Bartold ◽  
M. Prytulak
Keyword(s):  
Measurement Methods ◽  
Surface Shape ◽  
Shape Measurement ◽  
Digital Hologram

scholarly journals Software package for testing three-dimensional shape measurement methods using structured lighting

2021 ◽  
Vol 2057 (1) ◽  
pp. 012087
Author(s):  
S V Dvoynishnikov ◽  
V O Zuev ◽  
I K Kabardin ◽  
D V Kulikov ◽  
V V Rahmanov
Keyword(s):  
Software Package ◽  
Three Dimensional ◽  
Measurement Methods ◽  
Shape Measurement ◽  
Structured Lighting ◽  
Lighting Conditions ◽  
Ambient Lighting ◽  
Dimensional Shape ◽  
Shadow Maps ◽  
Three Dimensional Shape

Abstract This work aims at creating a universal software package for the development and testing of triangulation methods using structured lighting for measuring the three-dimensional geometry of objects in difficult ambient lighting conditions. As a result, a software package meeting the stated requirements is created. Lighting is based on the Fong model. A method for preloading objects is implemented to optimize the operation of the software package. An accelerated method for creating shadow maps is proposed and implemented. The developed software package is shown to successfully perform all required functions.

New Method for Surface Shape Measurement Based on Brox Optical Flow Algorithm

2020 ◽  
Vol 40 (17) ◽  
pp. 1712004
Author(s):  
唐钰欣 Tang Yuxin ◽  
孙平 Sun Ping ◽  
代晴 Dai Qing ◽  
范超 Fan Chao ◽  
类智方 Lei Zhifang
Keyword(s):  
Optical Flow ◽  
Surface Shape ◽  
New Method ◽  
Shape Measurement ◽  
Flow Algorithm

Determination of Phase Shift by Digital Holography

2019 ◽  
Vol 888 ◽  
pp. 43-46
Author(s):  
Yoshitaka Takahashi ◽  
Masatoshi Saito ◽  
Toru Nakajima ◽  
Masakazu Shingu
Keyword(s):  
Phase Shift ◽  
Noise Reduction ◽  
Digital Holography ◽  
High Accuracy ◽  
Measured Data ◽  
Phase Shifting ◽  
Surface Shape ◽  
Shape Measurement ◽  
Phase Shifting Interferometry

In phase shifting interferometry phase shift is applied by various ways, but applying it with high accuracy, especially by LD current modulation, is not easy. In order to determine the accurate phase shift a new method has been proposed that the value of LD current corresponding to π/2 phase shift can be determined by phase shifting digital holography. The measured data of standard in surface shape measurement were used for calibration, and the obtained value was confirmed to cause noise reduction and improvement of holographic reconstructed images in digital holography.

Real-time surface shape measurement by an active interferometer

1997 ◽  
Vol 4 (1) ◽  
pp. A216-A220 ◽  
Author(s):  
Ji-Yuan Liu ◽  
Ichirou Yamaguchi ◽  
Jun-ichi Kato ◽  
Toshinori Nakajima
Keyword(s):  
Real Time ◽  
Surface Shape ◽  
Shape Measurement ◽  
Active Interferometer

Simultaneous Two-Wavelength Digital Holography and Its Application to Surface Shape Measurement

2011 ◽  
Author(s):  
Daisuke Barada ◽  
Tomohiro Kiire ◽  
Jun-ichiro Sugisaka ◽  
Shigeo Kawata ◽  
Toyohiko Yatagai
Keyword(s):  
Digital Holography ◽  
Surface Shape ◽  
Shape Measurement
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