Dissertation > Industrial Technology > Radio electronics, telecommunications technology > Wireless communications > Lightwave communications, laser communications

The Affect about Scatter to Laser Underwater Imaging Clarity

Author SunFeiFei
Tutor ZhengBing
School Ocean University of China
Course Communication and Information System
Keywords Laser Underwater imaging Scattering
CLC TN929.1
Type Master's thesis
Year 2007
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Earth's marine area accounts for 70 % of the earth's surface , over 18,000 kilometers of coastline , the marine economy has begun into the national economic development plan , the marine industry is moving towards high-tech , oil and maritime transport development as the main indicator comprehensive development and utilization phase [1]. Most of China 's underwater oil pipeline in the muddy water of the continental shelf area , so the development of observation techniques in the muddy water has become an important part of the marine development technology . Development of marine resources , its fast but immersive underwater imaging equipment is essential. Underwater laser imaging technology has been made more perfect results at home and abroad , mainly range gating and synchronous scanning two methods . The existing underwater laser imaging technology , mainly one-way process to solve the water laser transmission backscatter . Even the purest water is filtered , and its attenuation of light is also very serious . [1] In the muddy water , the main factors affecting underwater imaging resolution scattering light and thus to improve the clarity of the underwater laser imaging underwater laser imaging arising from multiple scattering and backward reflection problems must be overcome . China 's offshore coastal water turbidity, scattering serious . In the characteristics of the laser underwater transmission characteristics based on the combination of the scattered light distribution analysis in the underwater laser imaging technology , the scattering effect of the impact of the transfer destination image clarity in the future , in order to be able to underwater observations in the received image to perform image processing. , The recovery of the damaged image of the underwater observation process technology by seeking the point spread function to repair the image , this method , however , there are many uncertain factors , the recovery of the damaged image effect is not ideal . Therefore , we designed a set of measurement experiments of underwater receiving images spread angle , from the the spread angle formed by the different water quality underwater laser imaging to provide reference data for future underwater image processing . Experimental results prove that the theory is correct based on the experiment , the experimental method is feasible .

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