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公开(公告)号：US11653084B2
公开(公告)日：2023-05-16
申请号：US17463392
申请日：2021-08-31
Applicant: Axis AB
Inventor： Björn Benderius , Jimmie Jönsson , Johan Jeppsson Karlin , Niclas Svensson
CPC classification number: H04N23/617 , G06T7/70 , G06V20/41 , H04N23/61 , H04N23/76 , G06T2207/10016 , G06V20/44 , H04N23/71
Abstract: A method of configuring a camera comprising: collecting a video data with the camera, providing a plurality of imaging profiles, each imaging profile being associated with a set of scene characteristics, for each imaging profile, generating a spatial output data in dependence on the video data and the set of scene characteristics of the imaging profile, wherein the spatial output data is indicative of spatial locations of events detected in the video data matching one or more of the scene characteristics, performing a comparison of the spatial output data of each of the plurality of imaging profiles, selecting a preferred imaging profile in dependence on the comparison, configuring the camera to operate according to the preferred imaging profile.
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公开(公告)号：US10757318B2
公开(公告)日：2020-08-25
申请号：US16220906
申请日：2018-12-14
Applicant: Axis AB
Inventor： Dennis Nilsson , Björn Benderius , Johan Jeppsson , Johan Nyström
Abstract: A method for determining a local contrast value for a digital image captured by an image sensor in a camera comprising: applying an edge detection algorithm to image data of the digital image, thereby obtaining a data set pertaining to edges in the digital image; calculating, based on said data set, an edge occurrence value for the digital image; estimating, based on image data of the digital image and a noise model of the image sensor, an estimated image sensor noise for the digital image; and computing the local contrast value as a relationship between the edge occurrence value of the digital image and the expected edge occurrence value for the digital image. A method for adjusting a focus setting of a camera using the local contrast value for images captured by the camera.
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公开(公告)号：US09402035B2
公开(公告)日：2016-07-26
申请号：US14696023
申请日：2015-04-24
Applicant: Axis AB
Inventor： Björn Benderius
CPC classification number: H04N5/2353 , G03B7/00 , H04N5/235 , H04N5/2356
Abstract: A device and method for determining exposure settings in a camera is disclosed. The method comprises capturing an image frame using an image sensor, the exposure of the capturing is based on an initial exposure value setting, determining a temporary exposure value by finding an exposure value that results in a substantially optimum value when applied to a total cost calculation, calculating a saturated pixels cost related to the saturated pixels for the captured image at the temporary exposure value, determining a next exposure value by finding a decrease in exposure value, in relation to the temporary exposure value, for which decrease a change in total cost for non-saturated pixels, in relation to the total cost for non-saturated pixels at the temporary exposure value, is substantially equal to the saturated pixel cost calculated at the temporary exposure value, using this determined next exposure value for capturing a new image frame.
Abstract translation: 公开了一种用于确定相机中的曝光设置的装置和方法。 该方法包括使用图像传感器拍摄图像帧，拍摄的曝光基于初始曝光值设置，通过在应用于总成本计算时找到导致基本上最佳值的曝光值来确定临时曝光值 计算与临时曝光值下的拍摄图像的饱和像素相关的饱和像素成本，通过找到相对于临时曝光值的曝光值的下降来确定下一曝光值，减少总成本的变化 对于非饱和像素，相对于临时曝光值下的非饱和像素的总成本，基本上等于在临时曝光值下计算的饱和像素成本，使用该确定的下一个曝光值来捕获新的图像帧 。
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公开(公告)号：US11252320B2
公开(公告)日：2022-02-15
申请号：US17194611
申请日：2021-03-08
Applicant: Axis AB
Inventor： Johan Jeppsson , Björn Benderius , Niclas Svensson , Fritjof Jonsson , Jonas Levin , Stefan Lindgren
Abstract: A method for determining whether a video camera is out-of-focus comprises: capturing image data; setting a focus setting difference threshold based on a filter function configured to filter the image data; adjusting a focus setting between a present focus setting and an altered focus setting such that a first subset of the image data is captured with the video camera being set in the present focus setting and such that a second subset of the image data is captured with the video camera being set in the altered focus setting, wherein the adjusting is performed such that a difference between the present and altered focus settings is below the threshold; forming the video stream by applying the filter function on the image data; determining first and second focus metrics of the image data; and determining whether the video camera is out-of-focus by comparing the first and second focus metrics.
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公开(公告)号：US10382780B2
公开(公告)日：2019-08-13
申请号：US15928798
申请日：2018-03-22
Applicant: Axis AB
Inventor： Anton Öhrn , Viktor Edpalm , Henrik Eliasson , Björn Benderius , Niclas Svensson , Xing Danielsson Fan , Fredrik Pihl
IPC: H04N19/117 , H04N19/137 , H04N19/107 , H04N19/55 , H04N19/593 , H04N19/182 , H04N19/503 , H04N19/159 , H04N19/176
Abstract: A method of encoding a video stream comprising receiving a frame of a video stream to be encoded, performing motion detection in the frame to identify steady regions, and temporally filtering the frame so as to provide temporally filtered pixel values. For a pixel in the steady regions of the frame, the temporally filtered pixel value is used when encoding the pixel, on a condition that the pixel belongs to a block of pixels of the frame that will be intra-coded. On a condition that the pixel instead belongs to a block of pixels of the frame that will be inter-coded, a value that was used when encoding a corresponding pixel of the immediately preceding frame is used when encoding the pixel.
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Patent Agency Ranking
公开(公告)号：US11272184B2
公开(公告)日：2022-03-08
申请号：US17069913
申请日：2020-10-14
Applicant: Axis AB
Inventor： Björn Benderius
IPC: H04N19/137 , H04N19/167 , H04N19/172 , H04N19/503 , H04N19/86
Abstract: Systems and methods are disclosed for inter-coding of a video. To inter-code a frame relative to a previous frame of the video, techniques disclosed include partitioning the frame and the previous frame into corresponding portions. Then, for each portion of the frame, a difference between the frame's portion and its corresponding portion in the previous frame is determined. A probability for suppressing the determined difference is further devised as a function of the difference. A decision whether to suppress the difference is then made based on the probability. If a decision to suppress has been made, the difference between the frame portion and the corresponding portion in the previous frame is suppressed before the frame portion is inter-encoded relative to the corresponding portion in the previous frame.
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公开(公告)号：US20190199933A1
公开(公告)日：2019-06-27
申请号：US16220906
申请日：2018-12-14
Applicant: Axis AB
Inventor： Dennis Nilsson , Björn Benderius , Johan Jeppsson , Johan Nyström
Abstract: A method for determining a local contrast value for a digital image captured by an image sensor in a camera comprising: applying an edge detection algorithm to image data of the digital image, thereby obtaining a data set pertaining to edges in the digital image; calculating, based on said data set, an edge occurrence value for the digital image; estimating, based on image data of the digital image and a noise model of the image sensor, an estimated image sensor noise for the digital image; and computing the local contrast value as a relationship between the edge occurrence value of the digital image and the expected edge occurrence value for the digital image. A method for adjusting a focus setting of a camera using the local contrast value for images captured by the camera.
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公开(公告)号：US20180278849A1
公开(公告)日：2018-09-27
申请号：US15928722
申请日：2018-03-22
Applicant: Axis AB
Inventor： Fredrik Pihl , Xing Danielsson Fan , Björn Benderius , Viktor Edpalm , Niclas Svensson , Henrik Eliasson
IPC: H04N5/232 , H04N19/139 , H04N19/105 , H04N19/154 , H04N19/177
CPC classification number: H04N5/23267 , H04N5/23229 , H04N5/23232 , H04N5/23254 , H04N5/243 , H04N19/105 , H04N19/139 , H04N19/154 , H04N19/177
Abstract: A method for controlling a video camera which is configured to capture and process image frames prior to encoding. The method comprises determining whether the video camera is going to encode an image frame as an intra-frame or an inter-frame. If the image frame is going to be encoded as an inter-frame, the video camera is controlled to capture and process the image frame using first settings prior to encoding. If the image frame is going to be encoded as an intra-frame, the video camera is controlled to capture and process the image frame using second settings prior to encoding, wherein the second settings are modified in relation to the first settings to further reduce a level of noise in the image 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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公开(公告)号：US10531001B2
公开(公告)日：2020-01-07
申请号：US15928722
申请日：2018-03-22
Applicant: Axis AB
Inventor： Fredrik Pihl , Xing Danielsson Fan , Björn Benderius , Viktor Edpalm , Niclas Svensson , Henrik Eliasson
IPC: H04N5/232 , H04N19/139 , H04N19/105 , H04N19/177 , H04N19/154 , H04N5/243
Abstract: A method for controlling a video camera which is configured to capture and process image frames prior to encoding. The method comprises determining whether the video camera is going to encode an image frame as an intra-frame or an inter-frame. If the image frame is going to be encoded as an inter-frame, the video camera is controlled to capture and process the image frame using first settings prior to encoding. If the image frame is going to be encoded as an intra-frame, the video camera is controlled to capture and process the image frame using second settings prior to encoding, wherein the second settings are modified in relation to the first settings to further reduce a level of noise in the image frame.
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