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Early-time diffusion in imaging through obscuring random media: two-way propagation and deblurring

机译:通过遮蔽随机介质来进行成像的早期扩散:双向传播和去模糊

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The radiative transport theory predicts that a short pulse propagating through a random medium consisting of discrete scatterers of sizes large compared to the wavelength develops to develop an "early-time diffusion" (ETD) component: a sharply rising structure in the time-resolved intensity, immediately following the coherent (ballistic) signal, but attenuated at a rate substantially lower than the coherent attenuation. This phenomenon offers a possibility of application in imaging through obscuring (e.g., atmospheric) media. We describe here an imaging scenario utilizing the ETD signal, evaluate the resulting point-spread function characterizing the image resolution, and show how that resolution can be significantly improved by means of regularized deconvolution techniques.
机译:辐射传输理论预测,短脉冲通过随机介质传播,该随机介质由离散的散射体组成,散射体的大小比波长大,因此会形成“早期扩散”(ETD)分量:时间分辨强度急剧上升的结构紧随相干(弹道)信号之后,但衰减速率远低于相干衰减。这种现象提供了通过遮蔽(例如,大气)介质在成像中应用的可能性。我们在这里描述一种利用ETD信号的成像场景,评估表征图像分辨率的结果点扩展函数,并展示如何通过正则反卷积技术显着提高该分辨率。

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