公开(公告)号：US10963997B2

公开(公告)日：2021-03-30

申请号：US16690429

申请日：2019-11-21

Applicant: Axis AB

Inventor： Sebastian Fors ,  Johan Jeppsson ,  Anton Ohrn ,  Jimmie Jonsson ,  Bjorn Benderius ,  Andreas Muhrbeck ,  Karin Dammer

IPC: G06T5/00 ,  H04N5/235

Abstract: A method and a digital video camera for reducing intensity variations in a video stream depicting a scene comprising capturing, using a first sensor setting, a first frame; detecting a change in intensity in a portion of the first frame, the portion represents a first area of the scene; determining a second sensor setting based on the first frame; capturing, using the second sensor setting, a second frame; creating a local tone mapping mask, wherein a local tone mapping in the first area of the scene is different from a local tone mapping in an area outside the first area, and wherein the local tone mapping in the area outside the first area is based on a relation between the first sensor setting and the second sensor setting; and applying the local tone mapping mask to the second frame.

公开(公告)号：US20200167901A1

公开(公告)日：2020-05-28

申请号：US16690429

申请日：2019-11-21

Applicant: Axis AB

Inventor： Sebastian Fors ,  Johan Jeppsson ,  Anton Ohrn ,  Jimmie Jonsson ,  Bjorn Benderius ,  Andreas Muhrbeck ,  Karin Dammer

IPC: G06T5/00 ,  H04N5/235

Abstract: A method and a digital video camera for reducing intensity variations in a video stream depicting a scene comprising capturing, using a first sensor setting, a first frame; detecting a change in intensity in a portion of the first frame, the portion represents a first area of the scene; determining a second sensor setting based on the first frame; capturing, using the second sensor setting, a second frame; creating a local tone mapping mask, wherein a local tone mapping in the first area of the scene is different from a local tone mapping in an area outside the first area, and wherein the local tone mapping in the area outside the first area is based on a relation between the first sensor setting and the second sensor setting; and applying the local tone mapping mask to the second frame.

公开(公告)号：US09906724B2

公开(公告)日：2018-02-27

申请号：US15251271

申请日：2016-08-30

Applicant: AXIS AB

Inventor： Dennis Nilsson ,  Johan Nystrom ,  Bjorn Benderius

IPC: H04N5/232

CPC classification number: H04N5/23254 ,  H04N5/23212 ,  H04N5/23258 ,  H04N5/2329 ,  H04N5/23296

Abstract: The present invention relates generally to auto focus algorithms for setting a focus of a camera. More specifically, the present invention relates to a method (600) and device for setting a focus of a camera wherein a camera motion level of the camera is continuously measured (S604) during the read-out of pixel data by a rolling shutter image sensor and wherein the auto focus algorithm uses weighted focus measures which are calculated (S612) using the continuously measured camera motion levels.