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Related Experiment Video

Updated: May 23, 2026

High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques

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Published on: December 3, 2013

Shape measurement of curved objects using multiple slit-ray projections.

Y Sato¹, H Kitagawa, H Fujita

¹Department of Electronic Engineering, Tokyo University of Agriculture&Technology, Koganei, Tokyo, Japan.

IEEE Transactions on Pattern Analysis and Machine Intelligence

|April 14, 2012

Summary

A novel shape measurement technique accurately captures curved object geometry. This method uses multiple slit-ray projections and a turntable for precise 3D surface reconstruction.

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Area of Science:

Engineering
Computer Vision
Metrology

Background:

Accurate 3D shape measurement of complex curved objects is crucial in various industries.
Traditional methods may struggle with accuracy and completeness for intricate geometries.

Purpose of the Study:

To develop and validate a robust method for precise shape measurement of curved objects.
To leverage multiple projection angles for comprehensive surface data acquisition.

Main Methods:

Utilizing a computer-controlled turntable to rotate the object.
Employing two directed slit-ray projectors for illumination.
Capturing line images of object reflections with an ITV camera.
Implementing a computer algorithm to calculate 3D surface coordinates.

Main Results:

The developed method accurately determines the spatial coordinates of the object's surface.
Multiple projections ensure comprehensive coverage of the object's shape.
Achieved high accuracy in the 3D shape measurement of curved objects.

Conclusions:

The proposed technique effectively measures the shape of curved objects.
The combination of slit-ray projection and turntable rotation offers a precise solution.
This method enhances accuracy and completeness in 3D object metrology.