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Lens-less wide-field imaging and depth sensing through a turbid scattering layer by round-trip field estimation

机译:通过往返现场估计通过浑浊散射层的镜头较小的宽场成像和深度感测

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摘要

Wide-field depth-resolved imaging through scattering media has been a longstanding problem in recent years. In thispaper, we proposed a reference-less compact imaging physical model, where the 3D light field data embedded in thevolumetric speckle stack through a strong diffuser is explored and analyzed. By utilizing wave-optics and a coherentround-trip field estimation method, the scattering matrix of the diffuser is precisely calibrated as a priori knowledge.After then, the multi-slice targets are placed between the light source and the diffuser, and a set of defocused intensitypattern are recorded for recovering the scattered object field. The real object field is extracted from inverse diffracting ofthe field employing the conjugation of the calibrated scattering matrix. Wide-field imaging is verified experimentally byrecording a resolution chart hidden behind a ground glass. The technique shows great potential in lens-less wave-frontsensing and non-reference 3D imaging.
机译:近年来,通过散射媒体进行广泛的深度分辨成像是一种长期存在的问题。在这方面纸张,我们提出了一种较少的小巧紧凑的成像物理模型,其中嵌入在其中的3D光场数据通过强大的漫射器进行体积散斑堆栈进行探索和分析。通过利用波光光学和一致的往返现场估计方法,扩散器的散射矩阵精确地校准为先验知识。然后,将多切片目标放置在光源和漫射器之间,以及一组散焦强度记录图案以恢复散射对象字段。真实的对象字段是从逆衍射中提取的采用校准散射基质的缀合的场。通过实验验证宽野成像记录隐藏在磨砂后面的分辨率图。该技术在镜头较小的波线方面显示出很大的潜力感应和非参考3D成像。

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