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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 51, Iss. 4 — Feb. 1, 2012
  • pp: A59–A66

Low-cost multispectral vegetation imaging system for detecting leaking CO2 gas

Justin A. Hogan, Joseph A. Shaw, Rick L. Lawrence, and Randal M. Larimer  »View Author Affiliations

Applied Optics, Vol. 51, Issue 4, pp. A59-A66 (2012)

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As a component of a multisensor approach to monitoring carbon sequestration sites for possible leaks of the CO2 gas from underground reservoirs, a low-cost multispectral imaging system has been developed for indirect detection of gas leaks through observations of the resulting stress in overlying vegetation. The imager employs front-end optics designed to provide a full 50° field of view with a small, low-cost CMOS detector, while still maintaining quasi-collimated light through the angle-dependent interference filters used to define the spectral bands. Red and near-infrared vegetation reflectances are used to compute the normalized difference vegetation index (NDVI) and spatial and temporal patterns are analyzed statistically to identify regions of anomalous stress, which are then flagged for closer inspection with in-situCO2 sensors. The system is entirely self-contained with an onboard compact computer and is housed in a weather-proof housing to enable extended outdoor deployment.

© 2012 Optical Society of America

OCIS Codes
(110.0110) Imaging systems : Imaging systems
(220.4830) Optical design and fabrication : Systems design
(280.0280) Remote sensing and sensors : Remote sensing and sensors
(110.4234) Imaging systems : Multispectral and hyperspectral imaging
(280.4788) Remote sensing and sensors : Optical sensing and sensors

Original Manuscript: August 18, 2011
Revised Manuscript: October 31, 2011
Manuscript Accepted: December 2, 2011
Published: January 31, 2012

Virtual Issues
Vol. 7, Iss. 4 Virtual Journal for Biomedical Optics

Justin A. Hogan, Joseph A. Shaw, Rick L. Lawrence, and Randal M. Larimer, "Low-cost multispectral vegetation imaging system for detecting leaking CO2 gas," Appl. Opt. 51, A59-A66 (2012)

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