IP Library › Granted Patent US 12,536,800
Granted Patent B2
US 12,536,800 · App. 18/113,175 · Granted Jan 27, 2026

Privacy preserving person reidentification

Inventors: Hugo Latapie (Long Beach, CA); Gaowen Liu (Austin, TX); Ozkan Kilic (Long Beach, CA); Adam James Lawrence (Pasadena, CA); Ramana Rao V. R. Kompella (Cupertino, CA)
Assignee: Cisco Technology, Inc.
G06V20/48G06V10/462G06V10/757G06V10/764G06V10/82G06V20/52
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Quick Facts
Patent No.
US 12,536,800
App. No.
18/113,175
Granted
Jan 27, 2026
Kind
B2
Abstract

In one embodiment, a device represents each of a plurality of objects depicted in video data captured by a plurality of cameras over time as a set of key points associated with that object. The device forms, for each of the plurality of objects, a set of timeseries of the set of key points associated with that object. The device performs reidentification of a particular one of the plurality of objects across video data captured by two or more of the plurality of cameras by matching sets of timeseries of key points associated with that object derived from video data captured by two or more of the plurality of cameras. The device provides an indication of the reidentification for display to a user.

Claims (43)

1 . A method comprising:

representing, by a device, each of a plurality of objects depicted in video data captured by a plurality of cameras over time as a set of key points associated with the each of the plurality of objects:

forming, by the device and for each of the plurality of objects and for each of the plurality of cameras, a set of timeseries of the set of key points associated with the each of the plurality of objects and the each of the plurality of cameras;

performing, by the device, reidentification of a particular one of the plurality of objects across video data captured by two or more of the plurality of cameras by matching two or more sets of timeseries of key points associated with the particular one of the plurality of objects derived from video data captured by the two or more of the plurality of cameras to each other; and

providing, by the device, an indication of the reidentification for display to a user.

2 . The method as in claim 1 , wherein representing each of the plurality of objects depicted in the video data captured by the plurality of cameras over time as a set of key points associated with the each of the plurality of object by:

detecting the set of key points associated with the particular one of the plurality of objects by applying a pose estimation model to the video data depicting the particular one of the plurality of objects.

3 . The method as in claim 1 , wherein the plurality of objects comprise people detected in the video data.

4 . The method as in claim 1 , wherein performing the reidentification comprises:

matching frequencies, amplitudes, subsequence motifs, discords, or semantic segmentations of the two or more sets of timeseries of key points associated with the particular one of the plurality of objects derived from video data captured by the two or more of the plurality of cameras to each other.

5 . The method as in claim 1 , wherein the indication of the reidentification comprises an overlay for the video data.

6 . The method as in claim 1 , wherein representing each of the plurality of objects as a set of key points associated with that object comprises:

detecting one or more perspective invariant metrics associated with the each of the plurality of objects.

7 . The method as in claim 6 , wherein the device detects the one or more perspective invariant metrics in part by:

performing homology based ground plane detection on the video data.

8 . The method as in claim 1 , wherein the device uses self-supervised learning to perform the reidentification.

9 . The method as in claim 1 , wherein the plurality of objects comprises one or more vehicles or animals.

10 . The method as in claim 1 , wherein the device is an edge device in a network.

11 . An apparatus, comprising:

a network interface to communicate with a computer network;

a processor coupled to the network interface and configured to execute one or more processes; and

a memory configured to store a process that is executed by the processor, the process when executed configured to:

represent each of a plurality of objects depicted in video data captured by a plurality of cameras over time as a set of key points associated with se each of the plurality of objects;

form, for each of the plurality of objects and for each of the plurality of cameras, a set of timeseries of the set of key points associated with the each of the plurality of objects and the each of the plurality of cameras;

perform reidentification of a particular one of the plurality of objects across video data captured by two or more of the plurality of cameras by matching two or more sets of timeseries of key points associated with the particular one of the plurality of objects derived from video data captured by the two or more of the plurality of cameras to each other; and

provide an indication of the reidentification for display to a user.

12 . The apparatus as in claim 11 , wherein the apparatus represents each of the plurality of objects depicted in the video data captured by the plurality of cameras over time as a set of key points associated with the each of the plurality objects by:

detecting the set of key points associated with the particular one of the plurality of objects by applying a pose estimation model to the video data depicting the particular one of the plurality of objects.

13 . The apparatus as in claim 11 , wherein the plurality of objects comprise people detected in the video data.

14 . The apparatus as in claim 11 , wherein the apparatus performs the reidentification by:

matching frequencies, amplitudes, subsequence motifs, discords, or semantic segmentations of the two or more sets of timeseries of key points associated with the particular one of the plurality of objects derived from video data captured by the two or more of the plurality of cameras to each other.

15 . The apparatus as in claim 11 , wherein the indication of the reidentification comprises an overlay for the video data.

16 . The apparatus as in claim 11 , wherein the apparatus represents each of the plurality of objects as a set of key points associated with that object by:

detecting one or more perspective invariant metrics associated with the each of the plurality of objects.

17 . The apparatus as in claim 16 , wherein the apparatus detects the one or more perspective invariant metrics in part by:

performing homology based ground plane detection on the video data.

18 . The apparatus as in claim 11 , wherein the apparatus uses self-supervised learning to perform the reidentification.

19 . The apparatus as in claim 11 , wherein the plurality of objects comprises one or more vehicles or animals.

20 . A tangible, non-transitory, computer-readable medium storing program instructions that cause a device to execute a process comprising:

representing, by the device, each of a plurality of objects depicted in video data captured by a plurality of cameras over time as a set of key points associated with the each of the plurality of objects;

forming, by the device and for each of the plurality of objects and for each of the plurality of cameras, a set of timeseries of the set of key points associated with the each of the plurality of objects and the each of the plurality of cameras;

performing, by the device, reidentification of a particular one of the plurality of objects across video data captured by two or more of the plurality of cameras by matching two or more sets of timeseries of key points associated with the particular one of the plurality of objects derived from video data captured by the two or more of the plurality of cameras to each other; and

providing, by the device, an indication of the reidentification for display to a user.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 24, 2023
From: LATAPIE, HUGO; LIU, GAOWEN; KILIC, OZKAN; LAWRENCE, ADAM JAMES; KOMPELLA, RAMANA RAO V. R.
To: CISCO TECHNOLOGY, INC.
Reel/Frame 062793/0718 →
Continuity (1)
Related Publication 20240290098A1 · Aug 29, 2024
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