Hogel-Free Holography
Hogel-Free Holography
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DOI：
10.1145/3516428
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发表时间：
2022-03
影响因子：
6.2
通讯作者：
Praneeth Chakravarthula;Ethan Tseng;H. Fuchs;Felix Heide
中科院分区：
文献类型：
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作者：
Praneeth Chakravarthula;Ethan Tseng;H. Fuchs;Felix Heide
全息术是一种用于高质量显示而不需要庞大、复杂的光学系统的有前途的途径。虽然最近的工作已经证明了2D场景的精确全息图生成，但3D场景的高质量全息投影直到现在还无法实现。现有的多平面3D全息方法无法在存在部分遮挡的情况下对波前进行建模，而全息立体图方法必须在空间分辨率和角度分辨率之间进行基本的权衡。此外，现有的3D全息显示方法依赖于将复振幅启发式编码到纯相位像素中，这导致具有严重伪影的全息图。输入表示、波前建模和优化方法的基本限制阻止了当今显示器中的无伪影3D全息投影。为了消除这些限制，我们引入了无全息全息图，它优化了真正的3D全息图，首次支持深度和视角相关的效果。我们的方法克服了立体图方法中典型的基本空间-角度分辨率权衡。此外，它避免了启发式编码方案，以实现在3D体积上的高图像保真度。我们验证了所提出的方法实现了10 dB的PSNR改善模拟全息重建。我们还验证了我们的方法与准确的视差和深度聚焦效果的实验原型。
Holography is a promising avenue for high-quality displays without requiring bulky, complex optical systems. While recent work has demonstrated accurate hologram generation of 2D scenes, high-quality holographic projections of 3D scenes has been out of reach until now. Existing multiplane 3D holography approaches fail to model wavefronts in the presence of partial occlusion while holographic stereogram methods have to make a fundamental tradeoff between spatial and angular resolution. In addition, existing 3D holographic display methods rely on heuristic encoding of complex amplitude into phase-only pixels which results in holograms with severe artifacts. Fundamental limitations of the input representation, wavefront modeling, and optimization methods prohibit artifact-free 3D holographic projections in today’s displays. To lift these limitations, we introduce hogel-free holography which optimizes for true 3D holograms, supporting both depth- and view-dependent effects for the first time. Our approach overcomes the fundamental spatio-angular resolution tradeoff typical to stereogram approaches. Moreover, it avoids heuristic encoding schemes to achieve high image fidelity over a 3D volume. We validate that the proposed method achieves 10 dB PSNR improvement on simulated holographic reconstructions. We also validate our approach on an experimental prototype with accurate parallax and depth focus effects.