FORCE: Physics-aware Human-object Interaction
This work addresses the need for more realistic and diverse human motion synthesis in computer graphics and animation, though it is incremental by focusing on physical attributes within an existing interaction framework.
The paper tackles the problem of generating realistic human-object interactions by incorporating physical attributes like mass and friction, which previous methods overlooked, and introduces the FORCE model that synthesizes diverse interactions by modeling the interplay between human force and object resistance, along with a new dataset for training.
Interactions between human and objects are influenced not only by the object's pose and shape, but also by physical attributes such as object mass and surface friction. They introduce important motion nuances that are essential for diversity and realism. Despite advancements in recent human-object interaction methods, this aspect has been overlooked. Generating nuanced human motion presents two challenges. First, it is non-trivial to learn from multi-modal human and object information derived from both the physical and non-physical attributes. Second, there exists no dataset capturing nuanced human interactions with objects of varying physical properties, hampering model development. This work addresses the gap by introducing the FORCE model, an approach for synthesizing diverse, nuanced human-object interactions by modeling physical attributes. Our key insight is that human motion is dictated by the interrelation between the force exerted by the human and the perceived resistance. Guided by a novel intuitive physics encoding, the model captures the interplay between human force and resistance. Experiments also demonstrate incorporating human force facilitates learning multi-class motion. Accompanying our model, we contribute a dataset, which features diverse, different-styled motion through interactions with varying resistances.