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Experimental study of a compressive line sensing imaging system in a turbulent environment

机译：湍流环境下压缩线传感成像系统的实验研究

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Turbulence poses challenges in many atmospheric and underwater surveillance applications. The compressive line sensing (CLS) active imaging scheme has been demonstrated in simulations and test tank experiments to be effective in scattering media such as turbid coastal water, fog, and mist. The CLS sensing model adopts the distributed compressive sensing theoretical framework that exploits both intrasignal sparsity and the highly correlated nature of adjacent areas in a natural scene. During sensing operation, the laser illuminates the spatial light modulator digital micromirror device to generate a series of one-dimensional binary sensing patterns from a codebook to encode the current target line segment. A single element detector photomultiplier tube acquires target reflections as the encoder output. The target can then be recovered using the encoder output and a predicted on-target codebook that reflects the environmental interference of original codebook entries. In this work, we investigated the effectiveness of the CLS imaging system in a turbulent environment. The development of a compact CLS prototype will be discussed, as will a series of experiments using various turbulence intensities at the Naval Research Lab's Simulated Turbulence and Turbidity Environment. The experimental results showed that the time-averaged measurements improved both the signal-to-noise radio and the resolution of the reconstructed image in the extreme turbulence environment. The contributing factors for this intriguing and promising result will be discussed. (C) 2016 Optical Society of America
机译：在许多大气和水下监视应用中，湍流构成挑战。压缩线感测（CLS）主动成像方案已在模拟和测试罐实验中得到证明，可以有效地散射诸如浑浊的沿海水，雾和薄雾之类的介质。 CLS传感模型采用分布式压缩传感理论框架，该框架利用信号内的稀疏性以及自然场景中相邻区域的高度相关性。在感测操作期间，激光照射空间光调制器数字微镜器件以从码本生成一系列一维二进制感测图案，以对当前目标线段进行编码。单元素探测器光电倍增管获取目标反射作为编码器输出。然后可以使用编码器输出和反映原始码本条目对环境的干扰的预测目标码本来恢复目标。在这项工作中，我们研究了在动荡环境中CLS成像系统的有效性。将讨论紧凑型CLS原型的开发，以及海军研究实验室的“模拟湍流和浊度环境”中使用各种湍流强度的一系列实验。实验结果表明，在极端湍流环境下，时间平均测量改善了信噪比无线电和重建图像的分辨率。我们将讨论导致这种有趣和有希望的结果的因素。 （C）2016美国眼镜学会

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