icpdBirch.pdf (1.03 MB)
Low-cost polarimetric imaging for surveillance
conference contribution
posted on 2023-06-09, 13:10 authored by Phil BirchPhil Birch, Rupert YoungRupert Young, Chris ChatwinChris ChatwinThe surveillance industry has traditionally focused on the use of colour intensity images and then used computer vision methods to extract information. Deep learning methods have been demonstrated successfully but require significant computational resources. Fog and rain still present a problem to these methods. Other non-optical imaging technologies are available but the applications can be cost sensitive. Polarimetric cameras offer a solution to some of these problems. This paper presents a practical and low cost design that uses between two and four HD cameras with a wide field of view. This system has an automatic calibration stage that ensures the video frames are synchronised in time. To produce the Stoke parameters each pixel from one camera must be mapped to the others. To perform this, a homography matrix for each camera is automatically discovered and maps each video stream into the correct spatial coordinates. This attempts to use SIFT keypoint mapping but since each input image is a different polarisation state there are potentially a low number of keypoints so an additional check stage is introduced. Calibration results are presented along with example images, post process methods and feature extraction results.
History
Publication status
- Published
File Version
- Accepted version
Journal
Proceedings of SPIE: Photonics Europe 2018, Unconventional Optical ImagingPublisher
SPIEExternal DOI
Volume
10677Event name
SPIE Photonics Europe Unconventional Optical ImagingEvent location
Strasbourg, FranceEvent type
conferenceEvent date
Sunday - Thursday 22 - 26 April 2018Place of publication
Strasbourg, FranceDepartment affiliated with
- Engineering and Design Publications
Research groups affiliated with
- Industrial Informatics and Signal Processing Research Group Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2018-05-08First Open Access (FOA) Date
2019-01-17First Compliant Deposit (FCD) Date
2018-05-08Usage metrics
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