Papers › Probabilistic Warp Consistency for Weakly-Supervised Semantic Correspondences

Probabilistic Warp Consistency for Weakly-Supervised Semantic Correspondences

8 Mar 2022CVPR 2022 1arXiv:2203.04279archive 2025-07-28

Prune Truong, Martin Danelljan, Fisher Yu, Luc van Gool

We propose Probabilistic Warp Consistency, a weakly-supervised learning objective for semantic matching. Our approach directly supervises the dense matching scores predicted by the network, encoded as a conditional probability distribution. We first construct an image triplet by applying a known warp to one of the images in a pair depicting different instances of the same object class. Our probabilistic learning objectives are then derived using the constraints arising from the resulting image triplet. We further account for occlusion and background clutter present in real image pairs by extending our probabilistic output space with a learnable unmatched state. To supervise it, we design an objective between image pairs depicting different object classes. We validate our method by applying it to four recent semantic matching architectures. Our weakly-supervised approach sets a new state-of-the-art on four challenging semantic matching benchmarks. Lastly, we demonstrate that our objective also brings substantial improvements in the strongly-supervised regime, when combined with keypoint annotations.

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