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公开(公告)号：US11630518B2
公开(公告)日：2023-04-18
申请号：US16969037
申请日：2019-01-22
Inventor： Hui Chen , Tarig Ballal Khidir Ahmed , Tareq Yousef Al-Naffouri
Abstract: A method for motion tracking and text recognition, the method including a step of generating ultrasound waves with a transmitter; a step of receiving the ultrasound waves at a receiver, the receiver including sensors that record the ultrasound waves; a step of estimating with a processor, angle-of-arrival information for the ultrasound waves; a step of associating the angle-of-arrival information with a gesture; a step of extracting features from the gesture; and a step of classifying the gesture as a specific text character based on the extracted features by comparing the extracted features with known text characters stored in one or more templates.
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公开(公告)号：US10386481B1
公开(公告)日：2019-08-20
申请号：US16040191
申请日：2018-07-19
Inventor： Hui Chen , Tarig Ballal Khidir Ahmed , Mohamed Saadeldin , Tareq Yousef Al-Naffouri
Abstract: A method and system for gesture recognition using angle-of-arrival information. The method includes generating ultrasound waves with a transmitter; receiving the ultrasound waves at a receiver that includes two pairs of sensors that record the ultrasound waves; estimating with a processor, first and second angle-of-arrivals θx(ti),θy(ti) for the ultrasound waves, where x and y indicate two perpendicular axes that form a plane in which the two pairs of sensors are distributed and the first and second angle-of-arrivals are defined relative to the plane; grouping N estimated first and second angle-of-arrivals θx(ti),θy(ti) values to form a matrix g that corresponds to the predetermined path; comparing the matrix g with plural gesture templates from a gesture dictionary; identifying a gesture template from the plural gesture templates that corresponds to the predetermined path; and displaying the gesture template associated with the predetermined path.
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