US 12,254,751 B2
Masking of objects in a video stream
Tor Nilsson, Lund (SE); and Song Yuan, Lund (SE)
Assigned to Axis AB, Lund (SE)
Filed by Axis AB, Lund (SE)
Filed on Jun. 3, 2022, as Appl. No. 17/831,499.
Claims priority of application No. 21186486 (EP), filed on Jul. 19, 2021.
Prior Publication US 2023/0017325 A1, Jan. 19, 2023
Int. Cl. G08B 13/196 (2006.01); G06T 7/194 (2017.01); G06V 20/52 (2022.01); G11B 27/031 (2006.01)
CPC G08B 13/19602 (2013.01) [G06T 7/194 (2017.01); G06V 20/52 (2022.01); G08B 13/19678 (2013.01); G11B 27/031 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method for masking of objects in a video stream, the method comprising:
acquiring a video stream;
detecting objects in the video stream;
determining that one detected object belongs to a foreground of the video stream indicative of moving objects and that one detected object belongs to a background of the video stream indicative of static objects;
classifying the detected object that belongs to the foreground to be of a specific type using a first classifier, and classifying the detected object that belong to the background to be of the specific type using a second classifier, the first classifier being configured to classify moving objects of the specific type and the second classifier being configured to classify static objects of the same specific type as the first classifier,
determining that the detected objects in the background and in the foreground are classified as being of the specific type of object, and
masking only the objects classified to be of the specific type in the foreground and in the background of the video stream.