  Spatio-temporal scene graphs represent interactions in a video by decomposing
scenes into individual objects and their pair-wise temporal relationships.
Long-term anticipation of the fine-grained pair-wise relationships between
objects is a challenging problem. To this end, we introduce the task of Scene
Graph Anticipation (SGA). We adapt state-of-the-art scene graph generation
methods as baselines to anticipate future pair-wise relationships between
objects and propose a novel approach SceneSayer. In SceneSayer, we leverage
object-centric representations of relationships to reason about the observed
video frames and model the evolution of relationships between objects. We take
a continuous time perspective and model the latent dynamics of the evolution of
object interactions using concepts of NeuralODE and NeuralSDE, respectively. We
infer representations of future relationships by solving an Ordinary
Differential Equation and a Stochastic Differential Equation, respectively.
Extensive experimentation on the Action Genome dataset validates the efficacy
of the proposed methods.
