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:
Oct. 27, 2020
Filed:
Feb. 26, 2018
Nod, Inc., Santa Clara, CA (US);
Harsh Menon, Cupertino, CA (US);
Kim Ng, Foster City, CA (US);
Alexander Weiss, Redwood City, CA (US);
Anush Elangovan, San Francisco, CA (US);
Aashik Ramachandrappa, Mountain View, CA (US);
NOD, INC., Santa Clara, CA (US);
Abstract
To accomplish 360-degree 6-DoF LED-based visual tracking, a tracked object has to be covered with sufficient number of LEDs so that when observed at any angle from an optical sensor, there are enough features to estimate the 6-DoF pose. Depending on the algorithm, typically, at least 4 feature points need to be seen in order to calculate the 6 DoF pose accurately. However, that would require many LEDs to be placed on the device for 360-degree visual coverage. As the number of LEDs increase, the device size increases because the LEDs need to be spaced out so that they will not fuse together into connected/overlapped blobs when seen from the optical sensor. Uniquely designed Lambertian Diffusers significantly reduce the number of LEDs required for 360 degree-6 DoF tracking and hence enable tracking with small form factor devices.