公开(公告)号：US20250005907A1

公开(公告)日：2025-01-02

申请号：US18734165

申请日：2024-06-05

Applicant: Axis AB

Inventor： Niclas DANIELSSON ,  Amanda NILSSON ,  Christian COLLIANDER ,  Sarah LAROSS

IPC: G06V10/77 ,  G06T3/4038 ,  G06V10/82

Abstract: A method for feature extraction of detected objects, comprising the steps of: receiving a plurality of images, each depicting an object detected by the object detecting application; concatenating the plurality of images into a composite image according to a grid pattern; feeding the composite image through a convolutional neural network (CNN) trained for feature extraction, wherein each convolutional layer of the CNN is configured to, while convolving input data to the convolutional layer using a convolutional filter: determine a currently convolved image of the plurality of images by determining a centre coordinate of a subset of the input data currently covered by the convolutional filter, and mapping the centre coordinate to the grid pattern; and selectively nullifying all weights of the convolutional filter that cover input data derived from any of the plurality of images not being the currently convolved image.

公开(公告)号：US20220309792A1

公开(公告)日：2022-09-29

申请号：US17675019

申请日：2022-02-18

Applicant: Axis AB

Inventor： Jakob GRUNDSTRÖM ,  Martin LJUNGQVIST ,  Simon MOLIN ,  Christian COLLIANDER

IPC: G06V20/52 ,  G06T7/215 ,  G06T7/73

Abstract: A method for determining images plausible to have a false negative object detection comprises providing a group of historic trajectories, wherein each historic trajectory comprises a reference track that represents one or more historic tracks and comprises an object class of historic object detections that belong to the one or more historic tracks; performing tracking; performing object detection; for a determined track that does not match any determined object detection, comparing the determined track with reference tracks of historic trajectories for identifying a matching reference track; upon identifying a matching reference track, defining images of the determined track as being plausible to have a false negative object detection for the object class of the historic trajectory comprising the matching reference track; and upon not identifying a matching reference track, defining the determined track as a false positive track.

公开(公告)号：US20210142149A1

公开(公告)日：2021-05-13

申请号：US17038528

申请日：2020-09-30

Applicant: Axis AB

Inventor： Markus SKANS ,  Christian COLLIANDER ,  Martin LJUNGQVIST ,  Willie BETSCHART ,  Niclas DANIELSSON

IPC: G06N3/04 ,  G06K9/62 ,  G06K9/00 ,  G06K9/32 ,  G06T5/50

Abstract: A method of object re-identification in images of objects comprises providing a plurality of neural networks for object re-identification, wherein each of the plurality of neural networks is trained on image data with different sets of anatomical features, each set being represented by a reference vector; receiving a plurality of images of objects and an input vector representing anatomical features that are depicted in all of the plurality of images; comparing the input vector with the reference vectors for determining, according to a predefined condition, the most similar reference vector; and inputting image data of the plurality of objects to the neural network represented by the most similar reference vector for determining whether the plurality of objects have the same identity.