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:
May. 27, 2014
Filed:
Mar. 23, 2012
Bryan E. Feldman, San Francisco, CA (US);
Arnab S. Dhua, Mountain View, CA (US);
Nalin Pradeep Senthamil, Santa Clara, CA (US);
Bryan E. Feldman, San Francisco, CA (US);
Arnab S. Dhua, Mountain View, CA (US);
Nalin Pradeep Senthamil, Santa Clara, CA (US);
A9.com, Inc., Palo Alto, CA (US);
Abstract
Processes such as image matching can be improved by utilizing a Polar Accumulated Signed Gradient (PASG), a feature descriptor vector that utilizes polar coordinates. Such an approach is efficient because it avoids the costly image rotation and resampling of conventional processes. Further, the gradients can be sampled over different regions in order to achieve effective weighting without analyzing all gradients and applying a weighting factor. Such efficiencies enable image matching to be performed on devices with limited computing capacity, such as smart phones and tablet computers.