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公开(公告)号：US12125241B2
公开(公告)日：2024-10-22
申请号：US17537538
申请日：2021-11-30
Applicant: VIVOTEK INC.
Inventor： Chao-Tan Huang
CPC classification number: G06T7/80 , G06T7/215 , G06V10/25 , G06V20/52 , G06T2207/30232
Abstract: A camera angle detection method is applied to a surveillance apparatus and includes detecting a plurality of straight lines within a surveillance image acquired by the surveillance apparatus, selecting at least one first candidate parallel line and at least one second candidate parallel line from the plurality of straight lines according to a directional trend, stretching the first candidate parallel line and the second candidate parallel line to acquire an intersection point, and computing parameter difference between the intersection point and a reference point of the surveillance image so as to transform the parameter difference to acquire a tilted angle of an optical axis of a lens of the surveillance apparatus relative to a supporting plane where the surveillance apparatus is located.
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公开(公告)号：US11288831B2
公开(公告)日：2022-03-29
申请号：US16680507
申请日：2019-11-12
Applicant: VIVOTEK INC.
Inventor： Chao-Tan Huang , Cheng-Chieh Liu
IPC: G06T7/70
Abstract: An information measuring method is used for measuring installation information of a camera disposed over a plane with an installation height and oriented towards the plane with a shooting angle. The information measuring method includes steps of disposing a first reference point and a second reference point on the plane; measuring a first distance and a second distance between the first reference point, the second reference point and a third reference point; capturing an image including the first reference point, the second reference point and the third reference point; analyzing the image to define a first reference line and a second reference line; determining a first angle and a second angle according to the first reference line, the second reference line and a first normal line; and determining the installation height and/or the shooting angle according to the first distance, the second distance, the first angle and the second angle.
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3.发明公开公开(公告)号：US20240185443A1
公开(公告)日：2024-06-06
申请号：US18380207
申请日：2023-10-16
Applicant: VIVOTEK INC.
Inventor： Chao-Tan Huang
IPC: G06T7/60
CPC classification number: G06T7/60 , G06T2207/30232
Abstract: A calibration method of apparatus installation parameter is applied to a surveillance device having an image receiver and an operation processor. The calibration method includes analyzing a detection image from the image receiver to acquire an apparatus installation parameter of the surveillance device, computing a height of at least one target object inside the detection image in accordance with the apparatus installation parameter, analyzing the height of the at least one target object via an error function to acquire an error computed value, computing a local minimal value of the error computed value relevant to the apparatus installation parameter via a gradient descent function, and finding the local minimal value to acquire an installation parameter vector so that the surveillance device executes analysis of the detection image according to the installation parameter vector.
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4.发明公开公开(公告)号：US20240046667A1
公开(公告)日：2024-02-08
申请号：US18216614
申请日：2023-06-30
Applicant: VIVOTEK INC.
Inventor： Chao-Tan Huang
CPC classification number: G06V20/625 , G06V20/52 , G06T7/62 , G06V10/44 , G06V10/56
Abstract: An image information transformation method is applied to an image analysis device with an operation processor and includes generating a false object datum in a predefined manner, and deciding whether to output the false object datum in accordance with an identification result of a user license.
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公开(公告)号：US12222220B2
公开(公告)日：2025-02-11
申请号：US17533073
申请日：2021-11-22
Applicant: VIVOTEK INC.
Inventor： Chao-Tan Huang
Abstract: A floor height detection method is applied to a surveillance camera, and a surveillance image captured by the surveillance camera contains a surveillance region. The floor height detection method includes dividing the surveillance image at least into a first region and a second region, acquiring an actual installing height matrix of the surveillance camera upon the first region and the second region, and utilizing a matrix factorization algorithm to analyze the actual installing height matrix to acquire floor heights within the surveillance region.
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Patent Agency Ranking
公开(公告)号：US20240144422A1
公开(公告)日：2024-05-02
申请号：US18379176
申请日：2023-10-12
Applicant: VIVOTEK INC.
Inventor： Chao-Tan Huang
CPC classification number: G06T3/4046 , G06T3/4084 , G06V10/225 , G06V10/82 , G06V20/52
Abstract: An image analysis method of increasing identification efficiency is applied to an image analysis device having an image receiver and an operation processor. The image analysis method includes setting a target pixel per feet (PPF) and detecting a specific area within a surveillance image acquired by the image receiver, computing a first dimension ratio difference between the target PPF and an initial PPF of the specific area, utilizing the first dimension ratio difference to adjust the specific area so that a second dimension ratio difference between the target PPF and an adjusted PPF of the adjusted specific area conforms to a preset condition, and utilizing the adjusted specific area with the adjusted PPF to be detection data for object detection network.
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公开(公告)号：US20220189064A1
公开(公告)日：2022-06-16
申请号：US17537538
申请日：2021-11-30
Applicant: VIVOTEK INC.
Inventor： Chao-Tan Huang
Abstract: A camera angle detection method is applied to a surveillance apparatus and includes detecting a plurality of straight lines within a surveillance image acquired by the surveillance apparatus, selecting at least one first candidate parallel line and at least one second candidate parallel line from the plurality of straight lines according to a directional trend, stretching the first candidate parallel line and the second candidate parallel line to acquire an intersection point, and computing parameter difference between the intersection point and a reference point of the surveillance image so as to transform the parameter difference to acquire a tilted angle of an optical axis of a lens of the surveillance apparatus relative to a supporting plane where the surveillance apparatus is located.
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公开(公告)号：US20200184599A1
公开(公告)日：2020-06-11
申请号：US16435553
申请日：2019-06-09
Applicant: VIVOTEK INC.
Inventor： Chao-Tan Huang
Abstract: An image stitching method capable of effectively decreasing an amount of sampling points is applied to a first monitoring image and a second monitoring image overlapped with each other and generated by a monitoring camera device. The image stitching method includes acquiring a first sampling point and a second sampling point respectively on the first monitoring image and the second monitoring image, detecting a first specific parameter of the first monitoring image and a second specific parameter of the second monitoring image, determining whether the first sampling point is matched with the second sampling point according to the first specific parameter and the second specific parameter, and deciding whether to stitch the first monitoring image and the second monitoring image by the first sampling point and the second sampling point according a determination result.
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公开(公告)号：US20230169664A1
公开(公告)日：2023-06-01
申请号：US18070476
申请日：2022-11-29
Applicant: VIVOTEK INC.
Inventor： Chao-Tan Huang
IPC: G06T7/246 , G06V10/764 , G06V20/52 , G06V10/74
CPC classification number: G06T7/248 , G06V10/764 , G06V20/52 , G06V10/761 , G06T2207/30232
Abstract: An object classifying and tracking method is applied to an image stream acquired by a surveillance camera for object identification. The object classifying and tracking method includes acquiring a first classify feature and a first dependent feature of a first target object in a first image of the image stream and a second classify feature and a second dependent feature of a second target object in a second image of the image stream, acquiring a dependent degree of the first classify feature and the second classify feature from a memory, transforming the second dependent feature via the dependent degree, and analyzing the first dependent feature and the transformed second dependent feature to determine whether the first target object and the second target object are the same object.
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公开(公告)号：US20210174469A1
公开(公告)日：2021-06-10
申请号：US16703885
申请日：2019-12-05
Applicant: VIVOTEK INC.
Inventor： Cheng-Chieh Liu , Hui-Chih Wang , Chang-Li Chen , Chao-Tan Huang
Abstract: An image stitching method applied to a monitoring camera apparatus with a first image receiver and a second image receiver for acquiring a first image and a second image. The image stitching method includes detecting a plurality of first features in the first image and a plurality of second features in the second image, dividing the plurality of first features at least into a first group and a second group and further dividing the plurality of second features at least into a third group, analyzing the plurality of first features and the plurality of second features via an identification condition to determine whether one of the first group and the second group is matched with the third group, and utilizing two matched groups to stitching the first image and the second image.
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