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Using disparity in digital holograms for three-dimensional object\ud segmentation

机译:在三维物体的数字全息图中使用视差\ ud 分割

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摘要

Digital holography allows one to sense and reconstruct the amplitude and phase of a wavefront reflected from or\udtransmitted through a real-world three-dimensional (3D) object. However, some combinations of hologram capture setup\udand 3D object pose problems for the reliable reconstruction of quantitative phase information. In particular, these are\udcases where the twin image or noise corrupts the reconstructed phase. In such cases it is usual that only amplitude is\udreconstructed and used as the basis for metrology. A focus criterion is often applied to this reconstructed amplitude to\udextract depth information from the sensed 3D scene. In this paper we present an alternative technique based on applying\udconventional stereo computer vision algorithms to amplitude reconstructions. In the technique, two perspectives are\udreconstructed from a single hologram, and the stereo disparity between the pair is used to infer depth information for\uddifferent regions in the field of view. Such an approach has inherent simplifications in digital holography as the epipolar\udgeometry is known a priori. We show the effectiveness of the technique using digital holograms of real-world 3D\udobjects. We discuss extensions to multi-view algorithms, the effect of speckle, and sensitivity to the depth of field of\udreconstructions
机译:数字全息术允许人们感测和重建从真实世界的三维(3D)对象反射或透射的波前的幅度和相位。然而,全息图捕获设置\ ud和3D对象的某些组合对定量相位信息的可靠重建提出了问题。特别是在双胞胎图像或噪声破坏重建相位的情况下。在这种情况下,通常仅对幅度进行重构并用作度量基础。通常将聚焦标准应用于此重构的振幅,以从感测到的3D场景中提取深度信息。在本文中,我们提出了一种基于\非常规立体计算机视觉算法来进行幅度重构的替代技术。在该技术中,从单个全息图重建了两个视角,并且使用这对全息图之间的立体视差来推断视野中不同区域的深度信息。这种方法在数字全息术中具有固有的简化,因为先验对数/预算法是已知的。我们使用现实3D \ udobjects的数字全息图展示了该技术的有效性。我们讨论了多视图算法的扩展,斑点的影响以及对\ udreconstructions景深的敏感性

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