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公开(公告)号：US10171763B2
公开(公告)日：2019-01-01
申请号：US15868362
申请日：2018-01-11
Applicant: Axis AB
Inventor： Emanuel Johansson , Jesper Bengtsson , Thomas Winzell
Abstract: An apparatus is disclosed for structural fixed pattern noise reduction in a video stream. A method may include, for each target pixel in a first image frame, defining a first target pixel patch, and defining a first search area comprising the first target pixel patch; for each pixel in the first search area, comparing a first pixel patch around the pixel with the first target pixel patch, and using the pixel when calculating an average for the target pixel. The method may include, in a second image frame, localizing a second target pixel, and defining a second search area comprising the second target pixel; for each pixel in the second search area, comparing a second pixel patch around the pixel of the second search area with the first target pixel patch, and using the pixel in the second search area when calculating an average for the target pixel.
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公开(公告)号：US11164008B2
公开(公告)日：2021-11-02
申请号：US16166955
申请日：2018-10-22
Applicant: Axis AB
Inventor： Xing Danielsson Fan , Niclas Danielsson , Anton Jakobsson , Emanuel Johansson , Thomas Winzell , Jesper Bengtsson
IPC: G06K9/00 , G08B13/196 , H04N7/18 , H04N5/33 , H04N19/167 , G07C9/00
Abstract: A method and a controller for controlling a video processing unit to facilitate detection of newcomers in a first environment. The method comprises: capturing a thermal image of a human object in the first environment, the first environment being associated with a first climate; calculating, based on the thermal image, a thermal signature of a portion of the human object; determining that the human object has entered the first environment from a second environment when the thermal signature of the portion of the human object deviates from a predetermined thermal signature associated with the first environment, wherein the second environment is associated with a second, different, climate; and controlling the video processing unit to prioritize the human object over other human objects when processing video frames depicting the human object together with the other human objects.
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3.发明申请公开(公告)号：US20190130197A1
公开(公告)日：2019-05-02
申请号：US16166955
申请日：2018-10-22
Applicant: Axis AB
Inventor： Xing Danielsson Fan , Niclas Danielsson , Anton Jakobsson , Emanuel Johansson , Thomas Winzell , Jesper Bengtsson
IPC: G06K9/00 , G08B13/196 , H04N5/33 , H04N19/167 , H04N7/18
Abstract: A method and a controller for controlling a video processing unit to facilitate detection of newcomers in a first environment. The method comprises: capturing a thermal image of a human object in the first environment, the first environment being associated with a first climate; calculating, based on the thermal image, a thermal signature of a portion of the human object; determining that the human object has entered the first environment from a second environment when the thermal signature of the portion of the human object deviates from a predetermined thermal signature associated with the first environment, wherein the second environment is associated with a second, different, climate; and controlling the video processing unit to prioritize the human object over other human objects when processing video frames depicting the human object together with the other human objects.
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公开(公告)号：US10430932B2
公开(公告)日：2019-10-01
申请号：US15706049
申请日：2017-09-15
Applicant: Axis AB
Inventor： Thomas Winzell , Emanuel Johansson
Abstract: A method for pseudo coloring of a digital single-channel image is disclosed. The method comprises acquiring a single-channel image having an intensity distribution, forming a first channel of a multi-channel image by performing a first histogram equalization of the intensity distribution, forming a second channel of the multi-channel image by performing a second, different, histogram equalization of the intensity distribution, wherein the first channel and the second channel of the multi-channel image represent different components of a color model. An arrangement for providing a pseudo coloring of a digital single-channel image is also disclosed, and a monitoring thermal camera system comprising such an arrangement.
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公开(公告)号：US10055847B2
公开(公告)日：2018-08-21
申请号：US15374270
申请日：2016-12-09
Applicant: Axis AB
Inventor： Emanuel Johansson
CPC classification number: G06T7/70 , G06K9/00771 , G06T7/20 , G08B13/196
Abstract: A method for detecting an object crossing event at a predetermined first line in a scene captured by a motion video camera is disclosed. The method comprises determining from images of the scene captured by the motion video camera if an object image crosses the predetermined first line, calculating a size value relating to the size of the object image crossing the predetermined first line, setting a line distance value to a value calculated from the distance between a contact point of the object with the predetermined first line and a nearby point on a predetermined second line, and generating an object crossing event signal if a relation between the calculated size value and the line distance is within a predetermined range.
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Patent Agency Ranking
公开(公告)号：US20180205898A1
公开(公告)日：2018-07-19
申请号：US15868362
申请日：2018-01-11
Applicant: Axis AB
Inventor： Emanuel Johansson , Jesper Bengtsson , Thomas Winzell
CPC classification number: H04N5/365 , G06K9/6202 , G06K9/6215 , G06T5/002 , H04N5/378
Abstract: An apparatus is disclosed for structural fixed pattern noise reduction in a video stream. A method may include, for each target pixel in a first image frame, defining a first target pixel patch, and defining a first search area comprising the first target pixel patch; for each pixel in the first search area, comparing a first pixel patch around the pixel with the first target pixel patch, and using the pixel when calculating an average for the target pixel. The method may include, in a second image frame, localizing a second target pixel, and defining a second search area comprising the second target pixel; for each pixel in the second search area, comparing a second pixel patch around the pixel of the second search area with the first target pixel patch, and using the pixel in the second search area when calculating an average for the target pixel.
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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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8.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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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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公开(公告)号：US20180075589A1
公开(公告)日：2018-03-15
申请号：US15706049
申请日：2017-09-15
Applicant: Axis AB
Inventor： Thomas Winzell , Emanuel Johansson
CPC classification number: G06T5/40 , G06T5/001 , G06T11/001 , G06T2207/10024
Abstract: A method for pseudo coloring of a digital single-channel image is disclosed. The method comprises acquiring a single-channel image having an intensity distribution, forming a first channel of a multi-channel image by performing a first histogram equalization of the intensity distribution, forming a second channel of the multi-channel image by performing a second, different, histogram equalization of the intensity distribution, wherein the first channel and the second channel of the multi-channel image represent different components of a color model. An arrangement for providing a pseudo coloring of a digital single-channel image is also disclosed, and a monitoring thermal camera system comprising such an arrangement.
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