公开(公告)号：US11935299B2

公开(公告)日：2024-03-19

申请号：US17716288

申请日：2022-04-08

Applicant: Cisco Technology, Inc.

Inventor： Samer Salam ,  Jad Al Aaraj

IPC: G06V10/25 ,  G06T3/40 ,  G06T5/00 ,  G06V10/74 ,  G06V20/40 ,  H04B10/116

CPC classification number: G06V20/46 ,  G06T3/40 ,  G06T5/002 ,  G06V10/25 ,  G06V10/761 ,  H04B10/116 ,  G06T2207/10016

Abstract: In one embodiment, a first device identifies a region of interest in video in which a light source of a second device is present by: using a current frame of the video and a prior frame of the video to compute a difference frame, performing thresholding on the current frame to form a threshold frame, and performing pixel-wise conjunction operations between the difference frame and the threshold frame, to identify a centroid of the light source of the second device. The first device detects a message within the region of interest transmitted by the second device via its light source. The device provides the message for review by a user.

公开(公告)号：US20230326209A1

公开(公告)日：2023-10-12

申请号：US17716288

申请日：2022-04-08

Applicant: Cisco Technology, Inc.

Inventor： Samer Salam ,  Jad Al Aaraj

IPC: G06V20/40 ,  G06V10/25 ,  G06T5/00 ,  G06V10/74 ,  G06T3/40 ,  H04B10/116

CPC classification number: G06V20/46 ,  G06V10/25 ,  G06T5/002 ,  G06T2207/10016 ,  G06T3/40 ,  H04B10/116 ,  G06V10/761

Abstract: In one embodiment, a first device identifies a region of interest in video in which a light source of a second device is present by: using a current frame of the video and a prior frame of the video to compute a difference frame, performing thresholding on the current frame to form a threshold frame, and performing pixel-wise conjunction operations between the difference frame and the threshold frame, to identify a centroid of the light source of the second device. The first device detects a message within the region of interest transmitted by the second device via its light source. The device provides the message for review by a user.