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1. (WO2001022872) A SYSTEM AND METHOD FOR ESTIMATING THE ORIENTATION OF AN OBJECT

Pub. No.:    WO/2001/022872    International Application No.:    PCT/US2000/026954
Publication Date: Apr 5, 2001 International Filing Date: Sep 29, 2000
IPC: G06K 9/00
G06T 7/00
Applicants: MICROSOFT CORPORATION
Inventors: TOYAMA, Kentaro
WU, Ying
Title: A SYSTEM AND METHOD FOR ESTIMATING THE ORIENTATION OF AN OBJECT
Abstract:
The present invention is embodied in a system and method for automatically estimating the orientation or pose of an object (230), such as a human head (416), from any viewpoint and includes training and pose estimation modules (210, 212). The training module (210) uses known head poses (220) for generating observations (222) of the different types of head poses and the pose estimation module (212) receives actual head poses (232) of a subject and uses the training observations (222) to estimate (236) the actual head pose. Namely, the training module (210) receives training data (220) and extracts unique features (222) of the data, projects (224) the features onto corresponding points of a model and determines a probability density function estimation (226) for each model point to produce a trained model. The pose estimation module (212) receives the trained model (210) and an input features (230) and extracts unique input features (232) of the input object (230), projects the input features (234) onto points of the trained model and determines an orientation (236) of the input object that most likely generates the features extracted from input object (230).