The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 28, 2022
Filed:
Aug. 24, 2020
Applicant:
Charles River Analytics, Inc., Cambridge, MA (US);
Inventors:
Assignee:
Charles River Analytics, Inc., Cambridge, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01P 7/00 (2006.01); G06T 7/50 (2017.01); G06T 7/246 (2017.01); G01P 15/08 (2006.01); G06T 5/00 (2006.01); H04W 88/02 (2009.01);
U.S. Cl.
CPC ...
G01P 7/00 (2013.01); G01P 15/08 (2013.01); G06T 5/006 (2013.01); G06T 7/246 (2017.01); G06T 7/50 (2017.01); G06T 2207/30241 (2013.01); H04W 88/02 (2013.01);
Abstract
Methods, techniques, apparatus, and algorithms are described for robustly measuring real-world distances using any mobile device equipped with an accelerometer and monocular camera. A general software implementation processes 2D video, precisely tracking points of interest across frames to estimate the unsealed trajectory of the device, which is used to correct the device's inertially derived trajectory. The visual and inertial trajectories are then aligned in scale space to estimate the physical distance travelled by the device and the true distance between the visually tracked points.