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首页> 外文会议>Stereoscopic Displays and Virtual Reality Systems XIV; Proceedings of SPIE-The International Society for Optical Engineering; vol.6490; Electronic Imaging Science and Technology >Crosstalk in automultiscopic 3-D displays: Blessing in disguise?
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Crosstalk in automultiscopic 3-D displays: Blessing in disguise?

机译：自动多角度3-D显示器中的串扰：因祸得福？

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摘要

Most of 3-D displays suffer from interocular crosstalk, i.e., the perception of an unintended view in addition to intended one. The resulting "ghosting" at high-contrast object boundaries is objectionable and interferes with depth perception. In automultiscopic (no glasses, multiview) displays using microlenses or parallax barrier, the effect is compounded since several unintended views may be perceived at once. However, we recently discovered that crosstalk in automultiscopic displays can be also beneficial. Since spatial multiplexing of views in order to prepare a composite image for automultiscopic viewing involves sub-sampling, prior anti-alias filtering is required. To date, anti-alias filter design has ignored the presence of crosstalk in automultiscopic displays. In this paper, we propose a simple multiplexing model that takes crosstalk into account. Using this model we derive a mathematical expression for the spectrum of single view with crosstalk, and we show that it leads to reduced spectral aliasing compared to crosstalk-free case. We then propose a new criterion for the characterization of ideal anti-alias pre-filter. In the experimental part, we describe a simple method to measure optical crosstalk between views using digital camera. We use the measured crosstalk parameters to find the ideal frequency response of anti-alias filter and we design practical digital filters approximating this response. Having applied the designed filters to a number of multiview images prior to multiplexing, we conclude that, due to their increased bandwidth, the filters lead to visibly sharper 3-D images without increasing aliasing artifacts.
机译：大多数3-D显示器都遭受眼间串扰，即除了预期的视图之外，还会看到意外的视图。在高对比度对象边界处产生的“重影”令人反感，并干扰了深度感知。在使用微透镜或视差栅栏的自动多镜（无眼镜，多视图）显示器中，由于可能同时感知到多个意外视图，因此效果更加复杂。但是，我们最近发现，自动多屏显示器中的串扰也可能是有益的。由于视图的空间多路复用以便准备用于自动多视点观看的合成图像涉及子采样，因此需要事先进行抗锯齿滤波。迄今为止，抗混叠滤波器设计已经忽略了自动多屏显示器中串扰的存在。在本文中，我们提出了一个简单的复用模型，该模型考虑了串扰。使用该模型，我们得出了具有串扰的单视图光谱的数学表达式，并且表明与无串扰的情况相比，它可以减少频谱混叠。然后，我们提出了表征理想抗混叠前置滤波器的新标准。在实验部分，我们描述了一种使用数码相机测量视图之间的光学串扰的简单方法。我们使用测得的串扰参数找到抗混叠滤波器的理想频率响应，并设计出近似该响应的实用数字滤波器。在多路复用之前将设计的滤镜应用于许多多视图图像之后，我们得出的结论是，由于其带宽增加，这些滤镜可产生明显更清晰的3-D图像，而不会增加混叠伪像。

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