Occlusion as a Monocular Depth Cue Derived from Illusory Contour Perception

Occlusion as a Monocular Depth Cue Derived from Illusory Contour Perception
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遮挡作为源自虚幻轮廓感知的单眼深度提示

DOI:
10.1007/978-3-642-04617-9_13
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发表时间:
2009
期刊:
影响因子:
--
通讯作者:
B. Mertsching
B. Mertsching
中科院分区:
--
文献类型:
--
作者:
M. Hund;B. Mertsching

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当三维场景被投影到相机或生物视觉系统的二维感受野时,所有深度信息都丢失了。即使没有知识库,我。e.在不知道可以看到什么对象的情况下,可以重建深度信息。除了立体深度线索之外,还可以使用多个单目深度线索。最重要的单目深度线索之一是物体边界的遮挡。因此,视觉系统的低级图像处理阶段的精细任务之一是完成杂乱或被遮挡的物体边界以及重叠边界的深度分配。我们描述了一种方法,从单眼深度线索,即所谓的虚幻轮廓在路口的边缘图的图像的安排深度排序和图形-地面隔离。因此,介绍了一种基于张量投票技术的感知虚幻轮廓的计算方法,并与通过样条插值实现的替代轮廓完成进行了比较。虽然大多数方法假设,路口的位置和相关轮廓的方向是已知的,我们也考虑了一个强大的感知任务所需的预处理步骤。这意味着输入图像的各向异性扩散,以便在保留边缘信息的同时简化图像内容。
When a three dimensional scene is projected to the two dimensional receptive field of a camera or a biological vision system, all depth information is lost. Even without a knowledgebase, i. e. without knowing what object can be seen, it is possible to reconstruct the depth information. Beside stereoscopic depth cues, also a number of moncular depth cues can be used. One of the most important monocular depth cues ist the occlusion of object boundaries. Therefore one of the elaborated tasks for the low level image processing stage of a vision system is the completion of cluttered or occluded object boundaries and the depth assignment of overlapped boundaries. We describe a method for depth ordering and figure-ground segregation from monocular depth cues, namely the arrangement of so-called illusory contours at junctions in the edge map of an image. Therefore, a computational approach to the perception of illusory contours, based on the tensor voting technique, is introduced and compared with an alternative contour completion realized by spline interpolation. While most approaches assume, that the position of junctions and the orientations of associated contours are already known, we also consider the preprocessing steps that are necessary for a robust perception task. This implies the anisotropic diffusion of the input image in order to simplify the image contents while preserving the edge information.
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