Visual target tracking using model fitting and exemplar

US7974443B2 · kind B2 · utility

Assignee

• Microsoft Corporation · US

Inventors

• Alex Aben-Athar Kipman · Redmond, US
• Mark J. Finocchio · Redmond, US
• Ryan M. Geiss · San Jose, US
• Johnny Lee · Pittsburgh, US
• Charles Claudius Marais · Duvall, US
• Zsolt Mathe · Issaquah, US

Key dates

• Filing date: Nov 23, 2010
• Grant date: Jul 5, 2011
• Expiry date: Nov 23, 2030

Classification

• Technology area (CPC G): Physics
• CPC primary: G06T2207/30196
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

A method of tracking a target includes receiving an observed depth image of the target from a source and analyzing the observed depth image with a prior-trained collection of known poses to find an exemplar pose that represents an observed pose of the target. The method further includes rasterizing a model of the target into a synthesized depth image having a rasterized pose and adjusting the rasterized pose of the model into a model-fitting pose based, at least in part, on differences between the observed depth image and the synthesized depth image. Either the exemplar pose or the model-fitting pose is then selected to represent the target.