Target velocity measurements from speckled images

Steve E. Watkins; Rathnakar Gopisetty; Sean J. Bentley; Richard A. Anderson

doi:10.1117/12.188055

30 September 1994 Target velocity measurements from speckled images

Steve E. Watkins, Rathnakar Gopisetty, Sean J. Bentley, Richard A. Anderson

Proceedings Volume 2302, Image Reconstruction and Restoration; (1994) https://doi.org/10.1117/12.188055
Event: SPIE's 1994 International Symposium on Optics, Imaging, and Instrumentation, 1994, San Diego, CA, United States

Abstract

The transverse component of velocity for a moving laser-illuminated target is determined using computer image processing. Active imaging is employed in which the target is coherently illuminated producing a speckled image in the pupil plane of a CCD array. Multiple image scans are recorded following the same procedure used to retrieve the incoherent target image. This data is electronically processed to produce an interference pattern dependent upon the distance traveled between image scans. The velocity component transverse to the line of sight of the system is calculated using the distance traveled and time elapsed between scans. The axial component of velocity is shown to reduce the visibility of the interference pattern.

Citation Download Citation

Steve E. Watkins, Rathnakar Gopisetty, Sean J. Bentley, and Richard A. Anderson "Target velocity measurements from speckled images", Proc. SPIE 2302, Image Reconstruction and Restoration, (30 September 1994); https://doi.org/10.1117/12.188055

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