High-Speed 3D Imaging with Digital Fringe Projection Techniques

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Optics 54, 9—17 User Username Password Remember me. This paper discusses technologies that enables 3D data acquisition, reconstruction, and display at 30 Hz or higher with over , measurement points per frame. This paper discusses methods permits tens of kHz 3D imaging rate at the camera pixel resolution.

High-Speed 3D Imaging with Digital Fringe Projection Techniques

This paper introduces the basic principles of each technology, and presents some applications that might be interesting to the mechatronics community. Article :. DOI: The measurement scale of the digital fringe projection technique mainly focused on a small scale, from several centimeters to tens of centimeters, due to the lack of a flexible and convenient calibration method for a large-scale digital fringe projection system.

In this study, we first developed a flexible and convenient large-scale calibration method and then extended the measurement scale of the digital fringe projection technique to several meters. The meter scale is needed in many large-scale robot applications, including large infrastructure inspection. Our proposed method includes two steps: 1 accurately calibrate intrinsics i.

Multi-Scale, Multi-Modal, High-Speed 3D Shape Measurement

The two-step strategy avoids fabricating a large and accurate calibration target, which is usually expensive and inconvenient for doing pose adjustments. Multi-modal information is required in applications such as medical robots, which may need both to capture the 3D geometry of objects and to monitor their temperature. To allow robots to have a more complete perception of the scene, we further developed a hardware system that can achieve real-time 3D geometry and temperature measurement.

Specifically, we proposed a holistic approach to calibrate both a structured light system and a thermal camera under exactly the same world coordinate system, even though these two sensors do not share the same wavelength; and a computational framework to determine the sub-pixel corresponding temperature for each 3D point, as well as to discard those occluded points. Since the thermal 2D imaging and 3D visible imaging systems do not share the same spectrum of light, they can perform sensing simultaneously in real time.

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