Underwater electro-optical system for mine identification

Proceedings of SPIE - The International Society for Optical Engineering

Volumn 2496, Issue , 1995, Pages 487-497

  Strand, Michael P ^a  

^a NAVAL SURFACE WARFARE CENTER   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 85079500856     PISSN: 0277786X     EISSN: 1996756X     Source Type: Conference Proceeding    
DOI: 10.1117/12.211304     Document Type: Conference Paper

References (8)

1. J. Leatham and B. W. Coles, "Use of Laser Sensors for Search and Survey, " Underwater Intervention '93 Conference Proceedings, 1993.
2. A. Gordon, "Underwater Laser Line Scan Technology, " Underwater Intervention '93 Conference Proceedings, 1993.
3. T. J. Kulp, D. Garvis, and R. Kennedy, "Current Status of the NAVSEA Synchronous Scanning Laser-Imaging System, " SPIE Proceedings, Vol. 980, 1988.
4. B. A. Swartz, "Diver and ROV Deployable Laser Range Gated Underwater Imaging Systems, " Underwater Intervention '93 Conference Proceedings, 1993.
5. Other definitions of contrast are possible, and may be more useful for certain purposes. This definition was used because it supports the separation of the effects of attenuation and backscatter from those of blur/glow/forward scatter.
6. Of course, if the signals are sufficiently attenuated, the image will be lost in the shot noise. Sufficient power and gain is required. However, shot noise is not the primary issue for the images under consideration.
7. The LLS images exhibit image distortions caused by non-uniform platform motions, especially roll induced by propeller torques when the platform is accelerating.
8. These images were taken during early evening, when ambient light levels were low. Comparable images taken near noon, when ambient light levels were high, led to significant contrast reductions at the lowest laser power levels due to ambient light effects.