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公开(公告)号：US11343447B2
公开(公告)日：2022-05-24
申请号：US17109520
申请日：2020-12-02
Applicant: Axis AB
Inventor： Thomas Winzell , Jesper Bengtsson , Mats Bylander
Abstract: Methods and apparatus, including computer program products, for detecting a problem with a thermal camera. A current contrast value is determined for the thermal camera. It is determined whether the current contrast value deviates from a reference contrast value by more than a predetermined value. In response to determining that the current contrast value deviates from the reference contrast value by more than a predetermined value and for more than a predetermined period of time, an indication of a problem with the thermal camera is provided.
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公开(公告)号：US10109042B2
公开(公告)日：2018-10-23
申请号：US15259403
申请日：2016-09-08
Applicant: AXIS AB
Inventor： Thomas Winzell , Emanuel Johansson , Mats Bylander , Jesper Bengtsson
Abstract: A method for increasing enhancing local contrast in a thermal image for a class of objects having a thermal characteristic is provided. The method including providing thermal image data representing a first thermal image, where the first thermal image is acquired by an absolute calibrated thermal imaging system, redistributing the thermal image data having a first intensity distribution into a second intensity distribution using a predetermined redistribution function, where the predetermined redistribution function is based on the thermal characteristic, such that the local contrast is enhanced for the class of objects, outputting the redistributed thermal image data as the thermal image. An apparatus for enhancing local contrast in a thermal image for a class of objects having a thermal characteristic is further provided.
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Patent Agency Ranking
3.发明申请MODIFICATION OF AT LEAST ONE PARAMETER USED BY A VIDEO PROCESSING ALGORITHM FOR MONITORING OF A SCENE 审中-公开用于监视场景的视频处理算法使用的最小一个参数的修改公开(公告)号：US20160117837A1
公开(公告)日：2016-04-28
申请号：US14880416
申请日：2015-10-12
Applicant: Axis AB
Inventor： Joakim BALTSEN , Mats Bylander
CPC classification number: G06T7/20 , G06K9/00771 , G06K9/00805 , G06K9/2018 , G06K9/2054 , G06K2009/00644 , G06T5/002 , G06T5/20 , G06T2207/10016 , G06T2207/10048 , G06T2207/20004 , G06T2207/20036 , G06T2207/30232 , H04N5/33
Abstract: There is provided a method, a device and a system for modifying at least one parameter used by a video processing algorithm, such as a motion detection algorithm, an object detection algorithm, or an object tracking algorithm, for monitoring of a scene (102). The method comprises: receiving a first (105a) and a second (105b) video sequence of the scene (102), wherein the first video sequence (105a) is captured using a thermal camera (104a) such that the first video sequence (105a) comprises thermal information being indicative of temperatures in the scene (102), and applying the video processing algorithm to the second video sequence (105b), wherein at least one parameter used by the video processing algorithm is modified based on the thermal information comprised in the first video sequence (105a).
Abstract translation: 提供了一种用于修改用于监视场景（102）的诸如运动检测算法，对象检测算法或对象跟踪算法的视频处理算法使用的至少一个参数的方法，装置和系统， 。 该方法包括：接收场景（102）的第一（105a）和第二（105b）视频序列，其中使用热相机（104a）捕获第一视频序列（105a），使得第一视频序列（105a） ）包括指示场景（102）中的温度的热信息，以及将视频处理算法应用于第二视频序列（105b），其中视频处理算法使用的至少一个参数基于包含在 第一视频序列（105a）。
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公开(公告)号：US11457205B2
公开(公告)日：2022-09-27
申请号：US17109770
申请日：2020-12-02
Applicant: Axis AB
Inventor： Thomas Winzell , Jesper Bengtsson , Mats Bylander
Abstract: Methods and apparatus, including computer program products, for detecting malfunction in a thermal camera. A first average response value is determined for a first shutter image captured by an image sensor in the thermal camera. A second average response value is determined of a second shutter image captured by the image sensor in the thermal camera. The first average response value and the second average response value are compared. In response to determining that the first average response value and the second average response value differ by more than a predetermined value, an indication of a malfunction of the thermal camera is provided.
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公开(公告)号：US10032283B2
公开(公告)日：2018-07-24
申请号：US14880416
申请日：2015-10-12
Applicant: Axis AB
Inventor： Joakim Baltsen , Mats Bylander
Abstract: There is provided a method, a device and a system for modifying at least one parameter used by a video processing algorithm, such as a motion detection algorithm, an object detection algorithm, or an object tracking algorithm, for monitoring of a scene (102). The method comprises: receiving a first (105a) and a second (105b) video sequence of the scene (102), wherein the first video sequence (105a) is captured using a thermal camera (104a) such that the first video sequence (105a) comprises thermal information being indicative of temperatures in the scene (102), and applying the video processing algorithm to the second video sequence (105b), wherein at least one parameter used by the video processing algorithm is modified based on the thermal information comprised in the first video sequence (105a).
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公开(公告)号：US09628751B2
公开(公告)日：2017-04-18
申请号：US14922346
申请日：2015-10-26
Applicant: Axis AB
Inventor： Emanuel Johansson , Mats Bylander , Jesper Bengtsson , Thomas Winzell
IPC: H04N5/77 , G06T5/00 , G08B13/196 , H04N7/18 , G06T5/50 , H04N21/2343 , H04N21/4402
CPC classification number: H04N5/772 , G06T5/002 , G06T5/50 , G06T2207/10016 , G06T2207/20182 , G06T2207/20216 , G06T2207/30232 , G08B13/196 , G08B13/19602 , H04N7/183 , H04N21/234354 , H04N21/440254
Abstract: There is provided a method for pre-processing a video stream for subsequent motion detection processing. The method comprises receiving a video stream of images, wherein each image in the video stream is represented by a first plurality of bits; enhancing the video stream of images by, for each image in the video stream: comparing the image to at least one previous image in the video stream so as to identify pixels where the image differs from the at least one previous image in the video stream, enhancing the image in those pixels where the image differs from the at least one previous image in the video stream; and converting the enhanced video stream of images so as to produce a converted video stream of images for subsequent motion detection processing, wherein each image in the converted video stream is represented by a second plurality of bits being lower than the first plurality of bits.
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7.发明申请公开(公告)号：US20170069069A1
公开(公告)日：2017-03-09
申请号：US15259403
申请日：2016-09-08
Applicant: AXIS AB
Inventor： Thomas Winzell , Emanuel Johansson , Mats Bylander , Jesper Bengtsson
IPC: G06T5/40
CPC classification number: G06T5/40 , G06T5/008 , G06T2207/10048 , H04N5/23229 , H04N5/2355 , H04N5/33
Abstract: A method for increasing enhancing local contrast in a thermal image for a class of objects having a thermal characteristic is provided. The method including providing thermal image data representing a first thermal image, where the first thermal image is acquired by an absolute calibrated thermal imaging system, redistributing the thermal image data having a first intensity distribution into a second intensity distribution using a predetermined redistribution function, where the predetermined redistribution function is based on the thermal characteristic, such that the local contrast is enhanced for the class of objects, outputting the redistributed thermal image data as the thermal image. An apparatus for enhancing local contrast in a thermal image for a class of objects having a thermal characteristic is further provided.
Abstract translation: 提供了一种用于增加对于具有热特性的一类物体的热图像中的局部对比度的增强的方法。 该方法包括提供表示第一热图像的热图像数据，其中通过绝对校准的热成像系统获取第一热图像，使用预定的再分布函数将具有第一强度分布的热图像数据重新分布到第二强度分布中，其中 预定的再分配功能基于热特性，使得对于对象类别增强局部对比度，输出重新分布的热图像数据作为热图像。 还提供了一种用于增强具有热特性的物体的热图像中的局部对比度的装置。
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