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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 >Surrogate depth maps for stereoscopic imaging: Different edge types
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Surrogate depth maps for stereoscopic imaging: Different edge types

机译：替代深度图以进行立体成像：不同的边缘类型

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摘要

Previously we demonstrated that surrogate depth maps, consisting of "depth" values mainly at object boundaries in the image of a scene, are effective for converting 2D images to stereoscopic 3D images using depth image based rendering. In this study we examined the use of surrogate depth maps whose depth edges were derived from cast shadows located in multiple images (Multiflash method). This method has the capability to delineate actual depth edges, in contrast to methods based on (Sobel) edge identification and (Standard Deviation) local luminance distribution. A group of 21 nonexpert viewers assessed the depth quality and visual comfort of stereoscopic images generated using these three methods on two sets of source images. Stereoscopic images based on the Multiflash method provided an enhanced depth quality that is better than the depth provided by a reference monoscopic image. Furthermore, the enhanced depth was comparable to that observed with the other two methods. However, all three methods generated images that were rated "mildly uncomfortable" or "uncomfortable" to view. It is concluded that there is no advantage in the use of the Multiflash method for creating surrogate depth maps. As well, even though the depth quality produced with surrogate depth maps is sufficiently good, the visual comfort of the stereoscopic images need to be improved before this approach of using surrogate depth maps can be deemed suitable for general use.
机译：之前，我们证明了替代深度图（主要由场景图像中对象边界处的“深度”值组成）可有效地使用基于深度图的渲染将2D图像转换为立体3D图像。在这项研究中，我们检查了替代深度图的使用，该深度图的深度边缘来自位于多个图像中的投射阴影（Multiflash方法）。与基于（Sobel）边缘识别和（Standard Deviation）局部亮度分布的方法相比，此方法具有描绘实际深度边缘的能力。由21位非专业观众组成的小组评估了使用这三种方法在两组源图像上生成的立体图像的深度质量和视觉舒适度。基于Multiflash方法的立体图像提供了增强的深度质量，该质量优于参考单视图像提供的深度。此外，增强的深度与其他两种方法所观察到的相当。但是，这三种方法生成的图像均被评为“轻微不舒服”或“不舒服”。结论是，使用Multiflash方法创建替代深度图没有任何优势。同样，即使利用替代深度图产生的深度质量足够好，在将这种使用替代深度图的方法视为适用于一般用途之前，还需要改善立体图像的视觉舒适度。

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