Mixture-of-Parts Pictorial Structures for Objects with Variable Part Sets

For many multi-part object classes, the set of parts can vary not only in location but also in type. For example, player formations in American football involve various subsets of player types, and the spatial constraints among players depend largely upon which subset of player types constitutes the formation. In this work, we study the problem of localizing and classifying the parts of such objects. Pictorial structures provide an efficient and robust mechanism for localizing object parts. Unfortunately, these models assume that each object instance involves the same set of parts, making it difficult to apply them directly in our setting. With this motivation, we introduce the mixture-of-parts pictorial structure (MoPPS) model, which is characterized by three components: a set of available parts, a set of constraints that specify legal part subsets, and a function that returns a pictorial structure for any legal part subset. MoPPS inference corresponds to jointly computing the most l...

• Type: Conference
• Year: 2007
• Where: ICCV
• Authors: Robin Hess, Alan Fern, Eric N. Mortensen
• Keywords: Computer Vision, ICCV 2007, Involve Various Subsets, Mixture-of-parts Pictorial Structure, MoPPS Inference Corresponds, Object Parts, Pictorial Structure