This work proposes a multi-image matching method to estimate semantic
correspondences across multiple images. In contrast to the previous methods
that optimize all pairwise correspondences, the proposed method identifies and
matches only a sparse set of reliable features in the image collection. In this
way, the proposed method is able to prune nonrepeatable features and also
highly scalable to handle thousands of images. We additionally propose a
low-rank constraint to ensure the geometric consistency of feature
correspondences over the whole image collection. Besides the competitive
performance on multi-graph matching and semantic flow benchmarks, we also
demonstrate the applicability of the proposed method for reconstructing
object-class models and discovering object-class landmarks from images without
using any annotation.

本研究提出了一种多图像匹配方法以估计多个图像之间的语义对应关系，并且利用稀疏可靠特征匹配而非优化所有成对对应关系，同时还提出低秩约束来确保整个图像集上的特征一致性。该方法在多图匹配和语义流基准测试中表现优异，同时在不使用任何注释的情况下对重建对象类模型和发现对象类地标具有适用性。