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You are at:Home»News»Sensors»University of Stuttgart uses SVS-Vistek cameras to
test holographic imaging capabilities for autonomous driving vision
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Sensors


UNIVERSITY OF STUTTGART USES SVS-VISTEK CAMERAS TO TEST HOLOGRAPHIC IMAGING
CAPABILITIES FOR AUTONOMOUS DRIVING VISION

By Callum Brook-Jones June 15, 2023 No Comments
LinkedIn Tweet Share Email +


To help address the issue of fog hampering autonomous vehicle vision, scientists
at the University of Stuttgart have carried out a large-scale experiment using
cameras from SVS-Vistek to investigate whether holographic imaging is reliable
in providing environmental perception during foggy scenarios.

The research team compared single-shot off-axis digital holography to
conventional imaging with coherent illumination. Results showed that holographic
imaging requires 30 times less illumination power for the same imaging range.

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During the experiment, the scientists built an off-axis holographic setup in an
image plane configuration which mimicked a car on a foggy road. For a light
source the team used a continuous wave laser with an optical power output of up
to 4W which was used to illuminate a 27m metal tube filled with ultrasonically
generated fog. Several large objects differing in size were then placed on one
end of the tube, and light reflected from these objects was then collected by
the lens before being imaged onto an SVS-Vistek eco655MVGE camera in 8-bit mode.

With the camera set at a resolution of 2448 x 2050 pixels and a pixel size of
3.45μm, fog density was monitored by measuring the beam attenuation of a
separate 780nm diode laser with a power meter in one-way propagation. Having
compiled the image data, the research team then compared both techniques at a
value that corresponds to the limit where the object becomes visible to human
perception in the fog.

In addition to using 30% less power, the team also found that unlike
conventional imaging equipment, holographic imaging is immune to an increase in
detection noise. The findings suggest that as the amount of stray light hitting
a detector increases, holographic imaging will still perform well.

The researchers state that the dimensions and scattering media used during the
experiments are extremely close to real-world autonomous driving conditions, and
the team believes these findings underscore the utility of holographic imaging
as a new sensor concept in automotive engineering.

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ABOUT AUTHOR

Callum Brook-Jones

After spending six years working as a mechanic for various motorsport and
high-end performance car companies, Callum joined UKi Media & Events in February
2020 as an assistant editor. In this role he uses his vast practical knowledge
and passion for automotive to produce informative news pieces for multiple
vehicle-related sectors. Currently, he is responsible for content across UKi
Media & Events' portfolio of websites while also writing for the company's print
titles.







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