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:
Dec. 29, 2020
Filed:
Feb. 11, 2020
Pixart Imaging Inc., Hsin-Chu, TW;
Hsin-Chia Chen, Sunnyvale, CA (US);
Sen-Huang Huang, Hsin-Chu, TW;
Wei-Chung Wang, Hsin-Chu, TW;
Chao-Chien Huang, Hsin-Chu, TW;
Ting-Yang Chang, Hsin-Chu, TW;
Chun-Wei Chen, Sunnyvale, CA (US);
PixArt Imaging Inc., Hsin-Chu, TW;
Abstract
An optical flow sensing method includes: using an image sensor to capture images; using a directional-invariant filter device upon at least one first block of the first image to process values of pixels of the at least one first block of the first image, to generate a first filtered block image; using the first directional-invariant filter device upon at least one first block of the second image to process values of pixels of the at least one first block of the second image, to generate a second filtered block image; comparing the filtered block images to calculate a correlation result; and estimating a motion vector according to a plurality of correlation results.