公开(公告)号：US10282617B2

公开(公告)日：2019-05-07

申请号：US15645455

申请日：2017-07-10

Applicant: QUALCOMM Incorporated

Inventor： Ying Chen ,  Ning Bi ,  Yang Zhou

IPC: G06K9/00 ,  H04N7/18 ,  G06K9/46

Abstract: Methods, apparatuses, and computer-readable media are provided for maintaining blob trackers for video frames. For example, a first blob tracker maintained for a current video frame is identified. The first blob tracker is associated with a blob detected in one or more video frames. The blob includes pixels of at least a portion of a foreground object in the one or more video frames. It is determined that the first blob tracker is a first type of tracker. Trackers having the first type are associated with objects that have transitioned at least partially into a background model (referred to as sleeping objects and sleeping trackers). One or more interactions are identified between the first blob tracker and at least one other blob tracker. The at least one other blob tracker can be the first type of tracker or can be a second type of tracker that is not a sleeping tracker (the second type of tracker is not associated with an object that has transitioned at least partially into the background model. A characteristic of the first blob tracker can then be modified based on the identified one or more interactions. Modifying the characteristic of the first blob tracker can include transitioning the first blob tracker from the first type of tracker to the second type of tracker, updating an appearance model of the first blob tracker, and/or other suitable characteristic of the first blob tracker.

公开(公告)号：US10268895B2

公开(公告)日：2019-04-23

申请号：US15973114

申请日：2018-05-07

Applicant: QUALCOMM Incorporated

Inventor： Ying Chen ,  Yang Zhou ,  Ning Bi

IPC: G06K9/00 ,  H04N5/225 ,  G06T7/194 ,  G06K9/03 ,  G06K9/46 ,  G06T7/50 ,  G06T7/90 ,  G06T7/246

Abstract: Techniques and systems are provided for maintaining blob trackers for one or more video frames. For example, a blob tracker is identified for a current video frame. The blob tracker is associated with a blob detected for the current video frame. The blob includes pixels of at least a portion of one or more objects in the current video frame. A current characteristic of pixels in a region of the current video frame associated with the blob tracker is determined. A previous characteristic of pixels in a region of a previous video frame associated with the blob tracker is also determined. A difference is determined between the current characteristic and the previous characteristic, and a status of the blob tracker is determined based on the determined difference. The status of the blob tracker indicating whether to maintain the blob tracker for the one or more video frames.