Omni-Supervised Learning for Dynamic Scene Understanding

Introduction

Computer vision has become a powerful technology, able to bring applications such as autonomous vehicles and social robots closer to reality. In order for autonomous vehicles to safely navigate a scene, they need to understand the dynamic objects around them.

Dynamic Scene Understanding

In other words, we need computer vision algorithms to perform dynamic scene understanding (DSU), i.e., detection, segmentation, and tracking of multiple moving objects in a scene. This is an essential feature for higher-level tasks such as action recognition or decision making for autonomous vehicles.

Challenges in Current Models

Much of the success of computer vision models for DSU has been driven by the rise of deep learning, in particular, convolutional neural networks trained on large-scale datasets in a supervised way. However, the closed-world created by our datasets is not an accurate representation of the real world.

Limitations of Annotated Object Classes

If our methods only work on annotated object classes, what happens if a new object appears in front of an autonomous vehicle?

Proposed Solutions

We propose to rethink the deep learning models we use, the way we obtain data annotations, as well as the generalization of our models to previously unseen object classes. To bring all the power of computer vision algorithms for DSU to the open-world, we will focus on three lines of research:

1. Models: We will design novel machine learning models to address the shortcomings of convolutional neural networks. A hierarchical (from pixels to objects) image-dependent representation will allow us to capture spatio-temporal dependencies at all levels of the hierarchy.

2. Data: To train our models, we will create a new large-scale DSU synthetic dataset and propose novel methods to mitigate the annotation costs for video data.

3. Open-World: To bring DSU to the open-world, we will design methods that learn directly from unlabeled video streams. Our models will be able to detect, segment, retrieve, and track dynamic objects coming from classes never previously observed during the training of our models.