公开(公告)号：US12217438B2

公开(公告)日：2025-02-04

申请号：US17174536

申请日：2021-02-12

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Zhijie Zhao ,  Yuntan Fang ,  Jun Zha ,  Hu Chen ,  Jiantong Zhou

IPC: G06K9/00 ,  G06T3/40 ,  G06T7/20 ,  G06T7/254 ,  G06V20/40

Abstract: Embodiments of this application disclose example apparatuses, methods, and computer program products for extracting a feature from an image of a scene. One example apparatus comprises at least one processor and one or more memories coupled to the at least one processor and storing programming instructions for execution by the at least one processor to, in response to a feature extraction event, extract a feature from first image data representing a first image of a scene, wherein the feature extraction event is based on second image data representing a second image of the scene.

公开(公告)号：US20210218913A1

公开(公告)日：2021-07-15

申请号：US17215729

申请日：2021-03-29

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zhaolei Xiao ,  Jiantong Zhou ,  Yuntan Fang ,  Shan Gao ,  Zhenhua Wu ,  Jing Xiao

IPC: H04N5/351 ,  H04N5/378

Abstract: This application provides a dynamic vision sensor. The sensor converts an optical signal into an electrical signal by using a photoelectric conversion unit, to generate a photovoltage; performs second-order difference on the photovoltage by using a second-order differential circuit; and generates a second-order event signal based on a result of second-order difference. A camera including the sensor can generate an image based on the second-order event signal, where the image represents a change of a light change speed.

公开(公告)号：US11490092B2

公开(公告)日：2022-11-01

申请号：US17170122

申请日：2021-02-08

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zhijie Zhao ,  Yuntan Fang ,  Jun Zha ,  Hu Chen ,  Jiantong Zhou

IPC: H04N19/176 ,  H04N19/137 ,  H04N19/132 ,  H04N19/167 ,  H04N7/01 ,  H04N19/31 ,  H04N19/33 ,  H04N5/335

Abstract: The present disclosure relates to encoding of video image using coding parameters, which are adapted based on events related to motion within the video image. Image content is captured by a standard image sensor and an event-triggered sensor, providing an event-signal indicating changes (e.g. amount and time-spatial location) of image intensity. Objects are detected within the video image, based on the event signal assessing motion of the object, and their textures extracted. The spatial-time coding parameters of the video image are determined based on the location and strength of the event signal, and the extent to which the detected objects moves.

公开(公告)号：US11310445B2

公开(公告)日：2022-04-19

申请号：US17215729

申请日：2021-03-29

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zhaolei Xiao ,  Jiantong Zhou ,  Yuntan Fang ,  Shan Gao ,  Zhenhua Wu ,  Jing Xiao

IPC: H04N5/351 ,  H04N5/378

Abstract: This application provides a dynamic vision sensor. The sensor converts an optical signal into an electrical signal by using a photoelectric conversion unit, to generate a photovoltage; performs second-order difference on the photovoltage by using a second-order differential circuit; and generates a second-order event signal based on a result of second-order difference. A camera including the sensor can generate an image based on the second-order event signal, where the image represents a change of a light change speed.

公开(公告)号：US20210168372A1

公开(公告)日：2021-06-03

申请号：US17170122

申请日：2021-02-08

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zhijie Zhao ,  Yuntan Fang ,  Jun Zha ,  Hu Chen ,  Jiantong Zhou

IPC: H04N19/137 ,  H04N19/132 ,  H04N19/167 ,  H04N19/176 ,  H04N7/01

Abstract: The present disclosure relates to encoding of video image using coding parameters, which are adapted based on events related to motion within the video image. Image content is captured by a standard image sensor and an event-triggered sensor, providing an event-signal indicating changes (e.g. amount and time-spatial location) of image intensity. Objects are detected within the video image, based on the event signal assessing motion of the object, and their textures extracted. The spatial-time coding parameters of the video image are determined based on the location and strength of the event signal, and the extent to which the detected objects moves.