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arXiv 2202.01309cs.CVcs.LG
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基于多分辨率因子图的立体对应算法

Multi-Resolution Factor Graph Based Stereo Correspondence Algorithm

The University of Memphis(孟菲斯大学)

Hanieh Shabanian, Madhusudhanan Balasubramanian

摘要:

可以根据场景的多个低维视图之间的密集视图对应来估计任意视图取向处的场景的密集深度图。这些低维视图对应依赖于视图和场景之间的几何关系。确定密集视图对应性是困难的,部分原因是由于场景中存在均匀区域,以及由于存在遮挡区域和视图之间的照明差异。我们提出了一种新的基于多分辨率因子图的立体匹配算法(MR-FGS),该算法利用了视图之间以及视差估计之间的分辨率内和分辨率间的依赖关系。建议的框架允许多个分辨率的对应问题之间的信息交换,是有用的处理较大的均匀区域的场景。MR-FGS算法进行了定性和定量评估,使用立体对在米德尔伯里立体基准数据集的基础上常用的性能指标。与最近开发的因子图模型(FGS)相比,MR-FGS算法提供了更准确的视差估计,而不需要通常使用的后处理过程,称为左右一致性检查。因子图模型中的多分辨率依赖性约束显著改善了MR-FGS生成的视差图中沿深度边界的对比度。

英文摘要:

A dense depth-map of a scene at an arbitrary view orientation can be estimated from dense view correspondences among multiple lower-dimensional views of the scene. These low-dimensional view correspondences are dependent on the geometrical relationship among the views and the scene. Determining dense view correspondences is difficult in part due to presence of homogeneous regions in the scene and due to presence of occluded regions and illumination differences among the views. We present a new multi-resolution factor graph-based stereo matching algorithm (MR-FGS) that utilizes both intra- and inter-resolution dependencies among the views as well as among the disparity estimates. The proposed framework allows exchange of information among multiple resolutions of the correspondence problem and is useful for handling larger homogeneous regions in a scene. The MR-FGS algorithm was evaluated qualitatively and quantitatively using stereo pairs in the Middlebury stereo benchmark dataset based on commonly used performance measures. When compared to a recently developed factor graph model (FGS), the MR-FGS algorithm provided more accurate disparity estimates without requiring the commonly used post-processing procedure known as the left-right consistency check. The multi-resolution dependency constraint within the factor-graph model significantly improved contrast along depth boundaries in the MR-FGS generated disparity maps.

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