Accommodation to multiple-focal-plane displays: Implications for improving stereoscopic displays and for accommodation control
Accommodation to multiple-focal-plane displays: Implications for improving stereoscopic displays and for accommodation control
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DOI：
10.1167/10.8.22
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发表时间：
2010-01-01
影响因子：
1.8
通讯作者：
Watt, Simon J.
中科院分区：
文献类型：
--
作者：
MacKenzie, Kevin J.;Hoffman, David M.;Watt, Simon J.
大多数立体显示器将图像呈现在单一的焦平面上，从而导致刺激的收敛和调节之间的“冲突”。最大限度地减少这些冲突是有益的，因为它们会导致深度感知扭曲、视觉疲劳和立体性能降低。一种建议的解决方案是在多个焦平面上呈现图像的总和，并通过在平面上分布图像强度来连续改变焦深-这一技术被称为深度过滤。我们通过测量在不同模拟距离处对深度过滤刺激的调节反应来评估这种对真实世界焦点深度变化的数字近似。具体地说，我们确定了支持准确和可靠适应的最大图像-平面分离。我们使用视网膜成像分析来预测反应可能不准确的时间。对深度过滤图像的适应对于高达1屈光度的图像平面分离是准确和精确的，这表明在实际显示中，深度过滤可以用来精确地匹配调节和聚焦要求。在更大的平面间隔中，响应以与我们的分析一致的方式分解。我们开发这一方法来考虑不同的空间频率如何对住宿控制做出贡献。结果表明，较高的空间频率对调节反应的贡献比之前认为的要小。
Most stereoscopic displays present images at a single focal plane, resulting in "conflicts" between the stimuli to vergence and accommodation. Minimizing these conflicts is beneficial because they can cause distorted depth percepts, visual fatigue, and reduced stereoscopic performance. One proposed solution is to present a sum of images at multiple focal planes and to vary focal depth continuously by distributing image intensity across planes-a technique referred to as depth filtering. We evaluated this digital approximation to real-world variations in focal depth by measuring accommodation responses to depth-filtered stimuli at various simulated distances. Specifically, we determined the maximum image-plane separation that supported accurate and reliable accommodation. We used an analysis of retinal-image formation to predict when responses might be inaccurate. Accommodation to depth-filtered images was accurate and precise for image-plane separations up to similar to 1 diopter, suggesting that depth filtering can be used to precisely match accommodation and vergence demands in a practical display. At larger plane separations, responses broke down in a manner consistent with our analysis. We develop this approach to consider how different spatial frequencies contribute to accommodation control. The results suggest that higher spatial frequencies contribute less to the accommodation response than has previously been thought.