about
MC-JEPA (arxiv.org)
1 point by beefman on Jul 27, 2023 | hide | past | pdf | 1 comment on HN

In plain words: A single network is trained on two goals at once: predicting how each pixel moves between video frames and learning to recognize what is in the image. It matched the best unsupervised motion-prediction methods and standard self-supervised training on image and video segmentation.

Abstract · MC-JEPA: A Joint-Embedding Predictive Architecture for Self-Supervised Learning of Motion and Content Features

Self-supervised learning of visual representations has been focusing on learning content features, which do not capture object motion or location, and focus on identifying and differentiating objects in images and videos. On the other hand, optical flow estimation is a task that does not involve understanding the content of the images on which it is estimated. We unify the two approaches and introduce MC-JEPA, a joint-embedding predictive architecture and self-supervised learning approach to jointly learn optical flow and content features within a shared encoder, demonstrating that the two associated objectives; the optical flow estimation objective and the self-supervised learning objective; benefit from each other and thus learn content features that incorporate motion information. The proposed approach achieves performance on-par with existing unsupervised optical flow benchmarks, as well as with common self-supervised learning approaches on downstream tasks such as semantic segmentation of images and videos.

Adrien Bardes, Jean Ponce, Yann LeCun
arXiv:2307.12698 · cs.CV, cs.AI, cs.LG · submitted Jul 24, 2023
abstract · pdf · html

add comment on HN

Rest of title: A Joint-Embedding Predictive Architecture for Self-Supervised Learning of Motion and Content Features

Tweet: https://twitter.com/ylecun/status/1684568474000195585