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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
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.
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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
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.
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公开(公告)号：US12254666B2
公开(公告)日：2025-03-18
申请号：US17943257
申请日：2022-09-13
Applicant: Axis AB
Inventor： Björn Benderius , Gunnar Dahlgren , Andreas Muhrbeck
Abstract: A method for stray light compensation is disclosed. The method comprising: acquiring a first image with a first imaging device covering a first field-of-view; acquiring a second image with a second imaging device covering a second field-of-view, wherein the second field-of-view is larger than the first field-of-view and wherein the first field-of-view is included in the second field-of-view; estimating stray light components in pixels of the first image from pixel data of pixels in the second image; and compensating for stray light in the first image by subtracting the estimated stray light components in pixels of the first image. Also, a system for stray light compensation is disclosed.
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