公开(公告)号：US11076101B2

公开(公告)日：2021-07-27

申请号：US16956606

申请日：2018-01-08

Applicant: Hanwha Techwin Co., Ltd.

Inventor： Cheol Ho Kim ,  Dae Bong Kim ,  Young Sang Kwon

IPC: H04N5/232

Abstract: A method of correcting an optical axis of a zoom lens includes obtaining a degree of optical axis misalignment corresponding to a current zoom lens state of a camera, considering the current zoom lens state of the camera and data previously stored to define a relationship between a state of the zoom lens of the camera and the degree of optical axis misalignment, determining digital zoom information to compensate for the degree of optical axis misalignment, considering the degree of optical axis misalignment, and generating correction image data by cropping and magnifying image data photographed by the camera to correspond to the digital zoom information.

公开(公告)号：US10567653B2

公开(公告)日：2020-02-18

申请号：US15933270

申请日：2018-03-22

Applicant: HANWHA TECHWIN CO., LTD.

Inventor： Dae Bong Kim ,  Cheol Ho Kim ,  Young Mi Kim ,  Sang Hyun Cho ,  Jong In Park

IPC: H04N7/18 ,  H04N5/232

Abstract: A method of rotating a surveillance camera having an acceleration sensor and being controllable by a processor to maintain a tilt-angle to conform to a command tilt-angle, includes the steps of moving the surveillance camera tilt to a predetermined command tilt-angle in response to a signal from the processor; periodically calculating estimated tilt-angles by using acceleration values in at least one axis of an acceleration sensor; calculating a difference value between an estimated tilt-angle of a current period and an estimated tilt-angle of a previous period; and when the difference value between the estimated tilt-angles exceeds a set limit, moving the camera to another position to correct the tilt angle according to the difference calculate.

公开(公告)号：US20190182425A1

公开(公告)日：2019-06-13

申请号：US15933270

申请日：2018-03-22

Applicant: HANWHA TECHWIN CO., LTD.

Inventor： Dae Bong KIM ,  Cheol Ho Kim ,  Young Mi Kim ,  Sang Hyun Cho ,  Jong In Park

IPC: H04N5/232

CPC classification number: H04N5/23258 ,  G08B13/1963 ,  G08B29/24 ,  H04N5/23267 ,  H04N5/23287

Abstract: A method of rotating a surveillance camera having an acceleration sensor and being controllable by a processor to maintain a tilt-angle to conform to a command tilt-angle, includes the steps of moving the surveillance camera tilt to a predetermined command tilt-angle in response to a signal from the processor; periodically calculating estimated tilt-angles by using acceleration values in at least one axis of an acceleration sensor; calculating a difference value between an estimated tilt-angle of a current period and an estimated tilt-angle of a previous period; and when the difference value between the estimated tilt-angles exceeds a set limit, moving the camera to another position to correct the tilt angle according to the difference calculate.