US 12,087,058 B2
Global motion suppression in an event-driven camera
Madhu Sudan Athreya, Palo Alto, CA (US); M. Anthony Lewis, Palo Alto, CA (US); and Srikanth Kuthuru, Palo Alto, CA (US)
Assigned to Hewlett-Packard Development Company, L.P., Spring, TX (US)
Appl. No. 17/429,960
Filed by Hewlett-Packard Development Company, L.P., Spring, TX (US)
PCT Filed Jun. 25, 2019, PCT No. PCT/US2019/038963
§ 371(c)(1), (2) Date Aug. 11, 2021,
PCT Pub. No. WO2020/263230, PCT Pub. Date Dec. 30, 2020.
Prior Publication US 2022/0108551 A1, Apr. 7, 2022
Int. Cl. G06V 20/52 (2022.01); H04N 23/68 (2023.01)
CPC G06V 20/52 (2022.01) [H04N 23/6815 (2023.01); H04N 23/684 (2023.01)] 20 Claims
OG exemplary drawing
 
1. A method, comprising:
detecting global motion of an event-driven camera based on a plurality of pixels of an event-driven image sensor detecting events;
suppressing the global motion by event-driven image sensor circuitry by:
generating a global activation signal in response to detecting the global motion, and
preventing pixel data of the plurality of pixels that is generated during the global motion from being processed in response to the global activation signal;
detecting a pixel fire signal when a given signal of the plurality of pixels reaches an event threshold indicative of an event in a field of view of the event-driven camera; and
reading out event pixel data of the given pixel in response to detection of the pixel fire signal.