
Proceedings Paper
Adaptive optics to enhance target recognitionFormat | Member Price | Non-Member Price |
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Paper Abstract
Target recognition can be enhanced by reducing image degradation due to atmospheric turbulence. This is
accomplished by an adaptive optic system. We discuss the forms of degradation when a target is viewed through
the atmosphere1: scintillation from ground targets on a hot day in visible or infrared light; beam spreading and
wavering around in time; atmospheric turbulence caused by motion of the target or by weather. In the case of
targets we can use a beacon laser that reflects back from the target into a wavefront detector to measure the
effects of turbulence on propagation to and from the target before imaging.1 A deformable mirror then corrects
the wavefront shape of the transmitted, reflected or scattered data for enhanced imaging. Further, recognition
of targets is enhanced by performing accurate distance measurements to localized parts of the target using lidar.
Distance is obtained by sending a short pulse to the target and measuring the time for the pulse to return. There
is inadequate time to scan the complete field of view so that the beam must be steered to regions of interest such
as extremities of the image during image recognition. Distance is particularly valuable to recognize fine features
in range along the target or when segmentation is required to separate a target from background or from other
targets. We discuss the issues involved.
Paper Details
Date Published: 17 May 2012
PDF: 7 pages
Proc. SPIE 8392, Signal Processing, Sensor Fusion, and Target Recognition XXI, 83921E (17 May 2012); doi: 10.1117/12.919449
Published in SPIE Proceedings Vol. 8392:
Signal Processing, Sensor Fusion, and Target Recognition XXI
Ivan Kadar, Editor(s)
PDF: 7 pages
Proc. SPIE 8392, Signal Processing, Sensor Fusion, and Target Recognition XXI, 83921E (17 May 2012); doi: 10.1117/12.919449
Show Author Affiliations
Alastair D. McAulay, Lehigh Univ. (United States)
Published in SPIE Proceedings Vol. 8392:
Signal Processing, Sensor Fusion, and Target Recognition XXI
Ivan Kadar, Editor(s)
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