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Patent Agency Ranking
公开(公告)号：US11017219B2
公开(公告)日：2021-05-25
申请号：US16305839
申请日：2017-05-17
Applicant: SHENZHEN VICTOOTH TERAHERTZ TECHNOLOGY CO., LTD , CHINA COMMUNICATION TECHNOLOGY CO., LTD.
Inventor： Chunchao Qi , Zhiquan Li , Hanjiang Chen , Guangsheng Wu , Shukai Zhao , Qing Ding
Abstract: This invention relates to a method and a device for human body gender detection in a microwave image. The structure feature of a human body itself as well as the constructed vertical direction spatial distribution histogram and horizontal direction spatial distribution histogram are used to accurately locate the chest position and the crotch position of the human body. A human body chest subimage is extracted according to the chest position, and a human body crotch subimage is extracted according to the crotch position. Then, the feature values of the human body chest subimage and the human body crotch subimage are respectively extracted by a feature value extraction algorithm, and the human body gender is automatically identified according to the feature values. The technical solution of this invention is simple, and after experimental verification, can be effectively applied in actual microwave security check system. This technical solution has high real time and high robustness, and its correct recognition rate meets the operating requirements. As such, the problem of how to identify human body gender in real time and accurately in a microwave security check system is solved. Besides, because the present invention can accurately locate the chest position and the crotch position of a human body, the human body's private part can be shielded and protected effectively according to this invention.
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公开(公告)号：US20200333504A1
公开(公告)日：2020-10-22
申请号：US16336772
申请日：2017-08-04
Applicant: CHINA COMMUNICATION TECHNOLOGY CO.,LTD.
Inventor： Hanjiang Chen , Zhiquan Li , Chunchao Qi , Shukai Zhao
Abstract: A millimeter wave image based human body foreign object detection method, comprising: acquiring a millimeter wave gray scale image of a human body; according to a pre-determined foreign object imaging characteristic, extracting from the millimeter wave gray scale image a foreign object area image; according to a pre-determined foreign object image recognition algorithm, performing calculations on the foreign object area image, and acquiring a foreign object image from the foreign object area image; displaying the foreign object image as a foreign object detection result. Also provided is a millimeter wave image based human body foreign object detection system.
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公开(公告)号：US11194073B2
公开(公告)日：2021-12-07
申请号：US16336772
申请日：2017-08-04
Applicant: CHINA COMMUNICATION TECHNOLOGY CO., LTD. , Shenzhen Institute of Terahertz Technology and Innovation
Inventor： Hanjiang Chen , Zhiquan Li , Chunchao Qi , Shukai Zhao
Abstract: A millimeter wave image based human body foreign object detection method, comprising: acquiring a millimeter wave gray scale image of a human body; according to a pre-determined foreign object imaging characteristic, extracting from the millimeter wave gray scale image a foreign object area image; according to a pre-determined foreign object image recognition algorithm, performing calculations on the foreign object area image, and acquiring a foreign object image from the foreign object area image; displaying the foreign object image as a foreign object detection result. Also provided is a millimeter wave image based human body foreign object detection system.
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公开(公告)号：US10884116B2
公开(公告)日：2021-01-05
申请号：US16033246
申请日：2018-07-12
Inventor： Chunchao Qi , Hanjiang Chen , Zhiquan Li
Abstract: A human-body foreign-matter detection method and system based on millimeter-wave image. The method comprises: obtaining a millimeter-wave grayscale image of a human body; extracting a human-body contour image in the millimeter-wave grayscale image; constructing a vertical space distribution histogram in a vertical direction and a horizontal space distribution histogram in a horizontal direction for the human-body contour image; obtaining positions of limbs of the human body according to the vertical space distribution histogram, the horizontal space distribution histogram and a pre-set human-body proportion model; identifying a foreign matter in the human-body contour image according to pre-set foreign-matter feature identification models; and marking a position of the foreign matter on the human-body contour image according to the positions of the limbs, and generating a foreign-matter detection result.
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公开(公告)号：US20180329053A1
公开(公告)日：2018-11-15
申请号：US16033246
申请日：2018-07-12
Inventor： Chunchao Qi , Hanjiang Chen , Zhiquan Li
CPC classification number: G01S13/887 , G01S7/41
Abstract: A human-body foreign-matter detection method and system based on millimeter-wave image. The method comprises: obtaining a millimeter-wave grayscale image of a human body; extracting a human-body contour image in the millimeter-wave grayscale image; constructing a vertical space distribution histogram in a vertical direction and a horizontal space distribution histogram in a horizontal direction for the human-body contour image; obtaining positions of limbs of the human body according to the vertical space distribution histogram, the horizontal space distribution histogram and a pre-set human-body proportion model; identifying a foreign matter in the human-body contour image according to pre-set foreign-matter feature identification models; and marking a position of the foreign matter on the human-body contour image according to the positions of the limbs, and generating a foreign-matter detection result.
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