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Coarse-to-Fine Lifted MAP Inference in Computer Vision

机译:计算机视觉中的粗对升降的地图推断

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There is a vast body of theoretical research on lifted inference in probabilistic graphical models (PGMs). However, few demonstrations exist where lifting is applied in conjunction with top of the line applied algorithms. We pursue the applicability of lifted inference for computer vision (CV), with the insight that a globally optimal (MAP) labeling will likely have the same label for two symmetric pixels. The success of our approach lies in efficiently handling a distinct unary potential on every node (pixel), typical of CV applications. This allows us to lift the large class of algorithms that model a CV problem via PGM inference. We propose a generic template for coarse-to-fine (C2F) inference in CV, which progressively refines an initial coarsely lifted PGM for varying quality-time trade-offs. We demonstrate the performance of C2F inference by developing lifted versions of two near state-of-the-art CV algorithms for stereo vision and interactive image segmentation. We find that, against flat algorithms, the lifted versions have a much superior anytime performance, without any loss in final solution quality.
机译:关于概率图形模型(PGMS)提升推断存在巨大的理论研究。然而,很少存在升降的示范,其中举起与线应用算法的顶部一起应用。我们对计算机视觉(CV)的提出推理的适用性,具有洞察力,即全球最佳(MAP)标记可能具有相同的两个对称像素标签。我们的方法的成功在于有效处理每个节点(像素)的不同的一致潜力,典型的简历应用。这使我们能够抬起通过PGM推断模拟CV问题的大类算法。我们提出了一种用于CV的粗致细(C2F)推理的通用模板,其逐渐改进初始粗糙的PGM以进行不同的质量 - 时间权衡。我们通过开发用于立体视觉和交互式图像分割的近最先进的CV算法的提升版本的提升版本的C2F推断的性能。我们发现,针对扁平算法,提升版本的随时性能越来越高,没有任何最终解决方案质量的损失。

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