Back to results
US 10,380,758 B2Granted
Method for tracking subject head position from monocular-source image sequence
AssigneeMad Street Den, Inc.
InventorsMarcus C. Colbert, Anand Chandrasekaran
Life of this patent
Estimating the term…
Abstract
A subject's head position and motion can be tracked by analyzing a series of frames from a monocular camera and mapping distinguishing points visible in the frames onto an elliptical cylinder. The tracking data can be used to control a physical pan/tilt actuator or to reconfigure/reposition virtual objects, images of which can be synthesized and displayed, or composited back into the original frames and displayed.
Claims9
A non-transitory computer-readable medium containing data and instructions to cause a programmable processor to perform operations comprising:
- analyzing an initial sequence of raster images of a subject to find a neutral image where a head of the subject is in a facing-forward position;
- identifying neutral fiducials in the neutral image;
- mapping the neutral fiducials to at least one three-dimensional cylinder model in a neutral position;
- receiving a tracking raster image after the initial sequence of raster images, said tracking raster image showing the head of the subject in a displaced position relative to the forward-facing position;
- identifying tracking fiducials in the tracking raster image;
- finding a displaced position of the at least one three-dimensional cylinder model such that the tracking fiducials map near the neutral fiducials on the at least one three-dimensional cylinder model;
- emitting tracking data to indicate how the displaced position is different from the neutral position;
- altering a configuration of a three-dimensional virtual model according to the tracking data;
- rendering an image of the three-dimensional virtual model;
- and
- displaying the image of the three-dimensional virtual model.
8 more elements
Dependencies are inferred from the claim text.