Perception of Perspective Distortions in Image-Based Rendering.
Perception of Perspective Distortions in Image-Based Rendering.
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基于图像的渲染中透视畸变的感知。
DOI：
10.1145/2461912.2461971
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发表时间：
2013-07-04
影响因子：
6.2
通讯作者：
Drettakis G
中科院分区：
文献类型：
--
作者：
Vangorp P;Richardt C;Cooper EA;Chaurasia G;Banks MS;Drettakis G
基于图像的渲染（IBR）通过用照片丰富简单的几何图形来创建逼真的图像，例如，将建筑物立面的照片映射到平面上。然而，一旦观看者离开了正确的视点，视网膜上的图像就会扭曲，有时会导致对原始几何形状的严重误解。来自视觉科学的两个假设说明了观众是如何感知这样的图像扭曲的，一个声称他们可以补偿它们（因此可以合理正确地感知场景几何），另一个声称他们不能补偿（因此可以感知相当大的扭曲）。我们修改了后一种假设，使其扩展到街道水平的IBR。然后，我们进行了一项严格的实验，测量了在正面观看时IBR发生的感知扭曲的程度。我们还进行了一个评级实验，评估扭曲的可接受性。这两个实验的结果是一致的。研究表明，观众的感知确实是扭曲的，但并不像修正视觉科学假说所预测的那样严重。根据我们的实验结果，我们开发了一个街道级IBR失真的预测模型，我们用它来为虚拟视图的可接受性和捕获相机密度提供指导。我们进行了一项验证性研究来验证我们的预测，并通过一个应用程序来说明它们的使用，该应用程序引导用户在IBR导航中停留在虚拟视图产生可接受的感知扭曲的区域。
Image-based rendering (IBR) creates realistic images by enriching simple geometries with photographs, e.g., mapping the photograph of a building façade onto a plane. However, as soon as the viewer moves away from the correct viewpoint, the image in the retina becomes distorted, sometimes leading to gross misperceptions of the original geometry. Two hypotheses from vision science state how viewers perceive such image distortions, one claiming that they can compensate for them (and therefore perceive scene geometry reasonably correctly), and one claiming that they cannot compensate (and therefore can perceive rather significant distortions). We modified the latter hypothesis so that it extends to street-level IBR. We then conducted a rigorous experiment that measured the magnitude of perceptual distortions that occur with IBR for façade viewing. We also conducted a rating experiment that assessed the acceptability of the distortions. The results of the two experiments were consistent with one another. They showed that viewers’ percepts are indeed distorted, but not as severely as predicted by the modified vision science hypothesis. From our experimental results, we develop a predictive model of distortion for street-level IBR, which we use to provide guidelines for acceptability of virtual views and for capture camera density. We perform a confirmatory study to validate our predictions, and illustrate their use with an application that guides users in IBR navigation to stay in regions where virtual views yield acceptable perceptual distortions.
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影响因子：
6.2
作者：
Steinicke, Frank;Bruder, Gerd;Kuhl, Scott
通讯作者：
Kuhl, Scott
影响因子：
2.2
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作者：
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影响因子：
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通讯作者：
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通讯作者：
O'Sullivan, Carol