Patents by Inventor Ching-An Cho
Ching-An Cho has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 12089961Abstract: The present invention provides a signal quality detection method for an ear-chip physiological measurement device. The signal quality detection method includes receiving a sensing signal from the ear-clip physiological measurement device; filtering the sensing signal to generate a pre-processed signal; calculating a physiological index according to the pre-processed signal; and calculating a similarity of a red light alternating current (AC) component and an infrared light AC component of the pre-processed signal and a plurality of correlation coefficients of the red light AC component, and generating a reliability index of the physiological index accordingly. The reliability index indicates one of a plurality of signal qualities.Type: GrantFiled: January 10, 2021Date of Patent: September 17, 2024Assignee: Wistron CorporationInventors: Hsuan-Tsung Chang, Kuo-Ting Huang, Ching-An Cho, Hao-Gong Chou
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Patent number: 12070309Abstract: A method for calculating blood oxygen saturation includes defining the extreme value point of a non-red light signal as the extreme value point of a red light signal, and calculating the blood oxygen saturation according to the extreme value point of the red light signal. The method for calculating blood oxygen saturation of the present disclosure proposes to use other light source signals to assist in finding the period of the red light signal, so that the calculation result of the red light signal is more accurate.Type: GrantFiled: May 13, 2021Date of Patent: August 27, 2024Assignee: Wistron Corp.Inventors: Zheng-De Liu, You-Jyun Syu, Ching-An Cho, Hao-Gong Chou
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Publication number: 20230346235Abstract: A wearable device with heart rate detection includes a heart rate detection assembly and a processor. The heart rate detection assembly is configured to obtain a plurality of dynamic heart rate signals according to a default frequency. The processor includes a finite state machine and a storage. The storage is configured to store the plurality of dynamic heart rate signals, and the finite state machine determines a heart rate state according to a sampling parameter and the plurality of dynamic heart rate signals. The processor obtains a weight according to the heart rate state, and obtains a dynamic heart rate value according to the weight.Type: ApplicationFiled: August 31, 2022Publication date: November 2, 2023Inventors: Hsuan-Tsung Chang, Hao-Gong Chou, Ching-An Cho
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Publication number: 20220233112Abstract: A method for calculating blood oxygen saturation includes defining the extreme value point of a non-red light signal as the extreme value point of a red light signal, and calculating the blood oxygen saturation according to the extreme value point of the red light signal. The method for calculating blood oxygen saturation of the present disclosure proposes to use other light source signals to assist in finding the period of the red light signal, so that the calculation result of the red light signal is more accurate.Type: ApplicationFiled: May 13, 2021Publication date: July 28, 2022Inventors: Zheng-De LIU, You-Jyun SYU, Ching-An CHO, Hao-Gong CHOU
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Patent number: 11380346Abstract: A method of determining noise reduction in a signal includes transforming the signal to generate a spectrogram; determining sharp change in a frequency spectrum for each frame in the spectrogram; and comparing a counted number of frames having sharp change with a predetermined value. The signal is determined to be subject to noise reduction if the counted number is greater than the predetermined value.Type: GrantFiled: May 22, 2020Date of Patent: July 5, 2022Assignee: Wistron CorporationInventors: Ching-An Cho, Yu-Yen Chen, Kuo-Ting Huang
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Publication number: 20220160308Abstract: The present invention provides a signal quality detection method for an ear-chip physiological measurement device. The signal quality detection method includes receiving a sensing signal from the ear-clip physiological measurement device; filtering the sensing signal to generate a pre-processed signal; calculating a physiological index according to the pre-processed signal; and calculating a similarity of a red light alternating current (AC) component and an infrared light AC component of the pre-processed signal and a plurality of correlation coefficients of the red light AC component, and generating a reliability index of the physiological index accordingly. The reliability index indicates one of a plurality of signal qualities.Type: ApplicationFiled: January 10, 2021Publication date: May 26, 2022Inventors: Hsuan-Tsung Chang, Kuo-Ting Huang, Ching-An Cho, Hao-Gong Chou
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Publication number: 20210280204Abstract: A method of determining noise reduction in a signal includes transforming the signal to generate a spectrogram; determining sharp change in a frequency spectrum for each frame in the spectrogram; and comparing a counted number of frames having sharp change with a predetermined value. The signal is determined to be subject to noise reduction if the counted number is greater than the predetermined value.Type: ApplicationFiled: May 22, 2020Publication date: September 9, 2021Inventors: Ching-An Cho, Yu-Yen Chen, Kuo-Ting Huang
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Publication number: 20210049771Abstract: A method and a computer system for object tracking are provided. The method includes the following steps. An image sequence including multiple images with a target object is obtained. A labelling operation corresponding to the target object in first two images and last two images in the image sequence is received to respectively generate four ground truth labels of the target object. A forward tracking of the target object is performed on the image sequence in time series according to the ground truth labels of the first two images to obtain a forward tracking result. A backward tracking of the target object is performed on the image sequence in time series according to the ground truth labels of the last two images to obtain a backward tracking result. The forward and the backward tracking results are compared to accordingly generate a final tracking result of the target object.Type: ApplicationFiled: October 18, 2019Publication date: February 18, 2021Applicant: Wistron CorporationInventors: Kuo-Ting Huang, Zhen-Te Liu, Yu-Yen Chen, Ching-An Cho
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Patent number: 10922822Abstract: An image analysis method applicable to an electronic system is provided. The electronic system includes an image capture device. The image analysis method includes: obtaining a plurality of images captured by the image capture device; performing a motion detection on the plurality of images to determine whether the images include a motion; and determining whether a target enters the preset scenery or leaves the preset scenery in response to a determination that the plurality of images include the motion according to the motion detection.Type: GrantFiled: October 9, 2018Date of Patent: February 16, 2021Assignee: Wistron CorporationInventors: Ching-An Cho, Kuo-Ting Huang
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Patent number: 10922818Abstract: A method and a computer system for object tracking are provided. The method includes the following steps. An image sequence including multiple images with a target object is obtained. A labelling operation corresponding to the target object in first two images and last two images in the image sequence is received to respectively generate four ground truth labels of the target object. A forward tracking of the target object is performed on the image sequence in time series according to the ground truth labels of the first two images to obtain a forward tracking result. A backward tracking of the target object is performed on the image sequence in time series according to the ground truth labels of the last two images to obtain a backward tracking result. The forward and the backward tracking results are compared to accordingly generate a final tracking result of the target object.Type: GrantFiled: October 18, 2019Date of Patent: February 16, 2021Assignee: Wistron CorporationInventors: Kuo-Ting Huang, Zhen-Te Liu, Yu-Yen Chen, Ching-An Cho
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Patent number: 10755400Abstract: A method and a computing device for monitoring an object are provided, where the method includes the following steps. An image sequence captured on a monitored area is received. Whether a target object is within a region of interest (ROI) of the monitored area is determined. If the determination is not affirmative and at least one first moving object is detected, whether the first moving object enters the ROI is determined according to a relative position between the first moving object and a detection boundary as well as whether the first moving object has continuous movements in the ROI. If the determination is affirmative, whether the target object leaves the ROI is determined according to a relative position between at least one second moving object associated with the target object and the detection boundary as well as whether the second moving object has continuous movements in a non-ROI.Type: GrantFiled: July 4, 2018Date of Patent: August 25, 2020Assignee: Wistron CorporationInventors: Zhen-Te Liu, Ching-An Cho
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Patent number: 10699107Abstract: An image detection method for determining the postures of a user includes: obtaining a plurality of images of a user; determining whether the user moves; and when the user is determined to be moving, calculating whether the amount of images is greater than a first predetermined value or not, calculating whether or not the amount of images of the user in the region of interest (ROI) is greater than a second predetermined value, and calculating whether or not the amount of images of the user not in the ROI is greater than a third predetermined value, in order to determine the postures of the user.Type: GrantFiled: March 13, 2018Date of Patent: June 30, 2020Assignee: Wistron Corp.Inventors: Po Chun Chen, Yu-Ren Lai, Ching-An Cho, Kuo Ting Huang, Yu-Yen Chen
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Patent number: 10698536Abstract: A method for detecting multiple touch positions on a touch surface, which is applicable to a touch apparatus having multiple optical sensing modules, where each optical sensing module includes at least two optical sensing devices.Type: GrantFiled: January 30, 2019Date of Patent: June 30, 2020Assignee: Wistron CorporationInventors: You-Jyun Syu, Ching-An Cho, Kuo-Ting Huang, Yu-Yen Chen
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Patent number: 10685220Abstract: An image detection method for determining the posture of a user includes: obtaining a reference image of the user in a region of interest (ROI); obtaining a test image of user at the ROI; executing a feature matching analysis of the test image which compares the feature parameter of the test image and the feature parameter of the reference image to determine the similarity information of the test image and the reference image; and executing a pixel distribution analysis of the test image to obtain user pixel distribution information; and determining the posture of the user based on the user similarity information and the user pixel distribution information.Type: GrantFiled: February 23, 2018Date of Patent: June 16, 2020Assignee: Wistron Corp.Inventors: Yu-Ren Lai, Po Chun Chen, Ching-An Cho, Kuo Ting Huang, Yu-Yen Chen
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Publication number: 20190385314Abstract: An image analysis method applicable to an electronic system is provided. The electronic system includes an image capture device. The image analysis method includes: obtaining a plurality of images captured by the image capture device; performing a motion detection on the plurality of images to determine whether the images include a motion; and determining whether a target enters the preset scenery or leaves the preset scenery in response to a determination that the plurality of images include the motion according to the motion detection.Type: ApplicationFiled: October 9, 2018Publication date: December 19, 2019Applicant: Wistron CorporationInventors: Ching-An Cho, Kuo-Ting Huang
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Publication number: 20190304080Abstract: A method and a computing device for monitoring an object are provided, where the method includes the following steps. An image sequence captured on a monitored area is received. Whether a target object is within a region of interest (ROI) of the monitored area is determined. If the determination is not affirmative and at least one first moving object is detected, whether the first moving object enters the ROI is determined according to a relative position between the first moving object and a detection boundary as well as whether the first moving object has continuous movements in the ROI. If the determination is affirmative, whether the target object leaves the ROI is determined according to a relative position between at least one second moving object associated with the target object and the detection boundary as well as whether the second moving object has continuous movements in a non-ROI.Type: ApplicationFiled: July 4, 2018Publication date: October 3, 2019Applicant: Wistron CorporationInventors: Zhen-Te Liu, Ching-An Cho
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Patent number: 10423848Abstract: A method, a system, and a computer-readable recording medium for long-distance person identification are provided. The method is applicable to a system having an image capturing device and a depth sensor and includes the following steps. An image of a user is captured by using the image capturing device to generate a user image, and depth information of a user is detected by using a depth sensor to generate user depth information. Soft biometric features of the user are obtained according to the user image and the user depth information, where the soft biometric features include silhouette information and human body features. A soft biometric feature similarity of the user is calculated based on the soft biometric features by using registered information of registered users so as to output a person identification result accordingly.Type: GrantFiled: August 7, 2017Date of Patent: September 24, 2019Assignee: Wistron CorporationInventors: You-Jyun Syu, Ching-An Cho, Ming-Che Ho
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Patent number: 10360943Abstract: A video editing method, a video editing device, and a video editing system are provided. A target is obtained from an original video. Relative position relations respectively between each frame and a previous frame and a next frame adjacent to it are obtained based on multiple image feature points of each frame. An adjustment process is executed respectively for each frame. The adjustment process includes: obtaining a frame N; identifying the target in the frame N; adjusting the frame N to obtain a new frame, wherein the target is located on a center of the new frame; and modifying the new frame based on the relative position relations to obtain a postproduction frame. A processed video is outputted based on multiple postproduction frames.Type: GrantFiled: November 24, 2017Date of Patent: July 23, 2019Assignee: Wistron CorporationInventors: Chia-Ta Hsieh, Ching-An Cho, Zhen-Te Liu
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Publication number: 20190155454Abstract: A method for detecting multiple touch positions on a touch surface, which is applicable to a touch apparatus having multiple optical sensing modules, where each optical sensing module includes at least two optical sensing devices.Type: ApplicationFiled: January 30, 2019Publication date: May 23, 2019Applicant: Wistron CorporationInventors: You-Jyun Syu, Ching-An Cho, Kuo-Ting Huang, Yu-Yen Chen
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Publication number: 20190122038Abstract: An image detection method for determining the posture of a user includes: obtaining a reference image of the user in a region of interest (ROI); obtaining a test image of user at the ROI; executing a feature matching analysis of the test image which compares the feature parameter of the test image and the feature parameter of the reference image to determine the similarity information of the test image and the reference image; and executing a pixel distribution analysis of the test image to obtain user pixel distribution information; and determining the posture of the user based on the user similarity information and the user pixel distribution information.Type: ApplicationFiled: February 23, 2018Publication date: April 25, 2019Inventors: Yu-Ren LAI, Po Chun CHEN, Ching-An CHO, Kuo Ting HUANG, Yu-Yen CHEN