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A Hybrid Frequency-Space Approach for Shape Measurement by Shadow Moiré Technique with Carrier Fringe Pattern
2006 Edition, April 1, 2006 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

In this paper, a novel methodology to process fringe pattern is presented. The core of the signal processing technique is the use of the direction information, a modulo 2pi quantity that locally informs about the direction along which fringes grow...

Vison-based 3D Shape Measurement System for Transparent Microdefect Characterization
Volume PP - IEEE - Institute of Electrical and Electronics Engineers, Inc.

The main task of vision-based industrial defect inspection is to implement efficient noncontact visual quality control, i.e., to detect if there is a defect and to achieve an accurate 3D shape measurement of such a defect, and this kind of vision defect inspection system...

3D shape measurement of translucent objects using Laser Rangefinder
2017 Edition, September 1, 2017 - The Society of Instrument and Control Engineers - SICE

Although many daily necessities are translucent object, it is difficult to measure the shape of translucent object with traditional 3D scamming approach. We observed the behavior of the light path and proposed the 3D shape measurement method for translucent...

A Direction/Orientation-Based Method for Shape Measurement by Shadow MoirÉ
2008 Edition, Volume 57, April 1, 2008 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

In this paper, a methodology to process fringe patterns is presented. The core of the signal processing technique is the use of the direction information, which is a modulo quantity that locally indicates the direction along which fringes grow at a...

3D shape measurement based on computer vision
2002 Edition, Volume 2, January 1, 2002 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

The fast, non-contact and highly precise shape measurement of objects is a key importance in the scientific-technological area as well as the area of practical measurement technology. A approach is proposed to determines the world coordinates of markers...

Data processing of roll-shape measurement system
2000 Edition, Volume 2, January 1, 2000 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

In this paper, data processing methods of roll-shape measurement system are discussed. We separately use least square method and neural network method to fit the curve of roll-shape. The results show that fitting precision of the neural network method is better than that of...

A flexible large-size shape-measurement system
2003 Edition, Volume 45, February 1, 2003 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

A flexible large-size shape-measurement system, based on the triangulation measurement principle, achieved high precision and non-contacting measurements of large shapes. The system overcomes the shortcomings of three-coordinate measurement machines....

Shape measurement by grating projection and whole-space tabulation method
2009 Edition, September 1, 2009 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

The authors previously proposed a shape measurement method using pixel-by-pixel calibration tables produced with multiple reference planes. In this method, all the relationships between the phase of the projected grating and the spatial coordinates can be obtained...

A fast 3-D shape measurement method for moving object
2014 Edition, May 1, 2014 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

This paper proposes a fast motion-compensated structured-light method that realizes 3-D shape measurement of moving object at 500 frames per second (fps) by using a high-frame-rate synchronized camera-projector system. In this method, multiple light...

Electronic endoscope system for shape measurement
2002 Edition, Volume 1, January 1, 2002 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

In endoscope observation, acquiring shape information of a lesion area is highly demanded for objective and statistical judgment. For in-vivo applications, a high-speed measurement is also considerable. Therefore, we proposed an electronic endoscope system...

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