Underwater pulsed laser range-gated imaging model and its effect on image degradation and restoration

Youwei Huang; Fengmei Cao; Weiqi Jin; Su Qiu

doi:10.1117/1.OE.53.6.061608

19 December 2013 Underwater pulsed laser range-gated imaging model and its effect on image degradation and restoration

Youwei Huang, Fengmei Cao, Weiqi Jin, Su Qiu

Author Affiliations +

Funded by: National Ministry of Science and Technology

Optical Engineering, Vol. 53, Issue 6, 061608 (December 2013). https://doi.org/10.1117/1.OE.53.6.061608

Abstract

The imaging of underwater objects illuminated by artificial light has been of long-standing interest to investigators working in oceanographic environments. Pulsed lasers together with range-gated technology have been widely used for underwater optical imaging applications. In order to describe the formation of underwater range-gated images, a pulsed laser underwater imaging model based on pulse spatial and temporal broadening is proposed. Experiments based on a self-assembled laser range-gated imaging system were implemented in our laboratory. Results show good agreements between experiments and simulations. Both results also confirm higher image contrast toward the tail region of the target-reflected light. Furthermore, experiments on underwater image blur and restoration are also implemented and show good image recovery results. The modulation transfer function-based restoration mechanism also implies a way to eliminate the blur effect caused by light forward scattering.

Citation Download Citation

Youwei Huang, Fengmei Cao, Weiqi Jin, and Su Qiu "Underwater pulsed laser range-gated imaging model and its effect on image degradation and restoration," Optical Engineering 53(6), 061608 (19 December 2013). https://doi.org/10.1117/1.OE.53.6.061608

Published: 19 December 2013

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