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).

  • Patent number: 12089961
    Abstract: 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: Grant
    Filed: January 10, 2021
    Date of Patent: September 17, 2024
    Assignee: Wistron Corporation
    Inventors: Hsuan-Tsung Chang, Kuo-Ting Huang, Ching-An Cho, Hao-Gong Chou
  • Patent number: 12070309
    Abstract: 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: Grant
    Filed: May 13, 2021
    Date of Patent: August 27, 2024
    Assignee: Wistron Corp.
    Inventors: Zheng-De Liu, You-Jyun Syu, Ching-An Cho, Hao-Gong Chou
  • Publication number: 20230346235
    Abstract: 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: Application
    Filed: August 31, 2022
    Publication date: November 2, 2023
    Inventors: Hsuan-Tsung Chang, Hao-Gong Chou, Ching-An Cho
  • Publication number: 20220233112
    Abstract: 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: Application
    Filed: May 13, 2021
    Publication date: July 28, 2022
    Inventors: Zheng-De LIU, You-Jyun SYU, Ching-An CHO, Hao-Gong CHOU
  • Patent number: 11380346
    Abstract: 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: Grant
    Filed: May 22, 2020
    Date of Patent: July 5, 2022
    Assignee: Wistron Corporation
    Inventors: Ching-An Cho, Yu-Yen Chen, Kuo-Ting Huang
  • Publication number: 20220160308
    Abstract: 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: Application
    Filed: January 10, 2021
    Publication date: May 26, 2022
    Inventors: Hsuan-Tsung Chang, Kuo-Ting Huang, Ching-An Cho, Hao-Gong Chou
  • Publication number: 20210280204
    Abstract: 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: Application
    Filed: May 22, 2020
    Publication date: September 9, 2021
    Inventors: Ching-An Cho, Yu-Yen Chen, Kuo-Ting Huang
  • Publication number: 20210049771
    Abstract: 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: Application
    Filed: October 18, 2019
    Publication date: February 18, 2021
    Applicant: Wistron Corporation
    Inventors: Kuo-Ting Huang, Zhen-Te Liu, Yu-Yen Chen, Ching-An Cho
  • Patent number: 10922822
    Abstract: 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: Grant
    Filed: October 9, 2018
    Date of Patent: February 16, 2021
    Assignee: Wistron Corporation
    Inventors: Ching-An Cho, Kuo-Ting Huang
  • Patent number: 10922818
    Abstract: 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: Grant
    Filed: October 18, 2019
    Date of Patent: February 16, 2021
    Assignee: Wistron Corporation
    Inventors: Kuo-Ting Huang, Zhen-Te Liu, Yu-Yen Chen, Ching-An Cho
  • Patent number: 10755400
    Abstract: 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: Grant
    Filed: July 4, 2018
    Date of Patent: August 25, 2020
    Assignee: Wistron Corporation
    Inventors: Zhen-Te Liu, Ching-An Cho
  • Patent number: 10699107
    Abstract: 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: Grant
    Filed: March 13, 2018
    Date of Patent: June 30, 2020
    Assignee: Wistron Corp.
    Inventors: Po Chun Chen, Yu-Ren Lai, Ching-An Cho, Kuo Ting Huang, Yu-Yen Chen
  • Patent number: 10698536
    Abstract: 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: Grant
    Filed: January 30, 2019
    Date of Patent: June 30, 2020
    Assignee: Wistron Corporation
    Inventors: You-Jyun Syu, Ching-An Cho, Kuo-Ting Huang, Yu-Yen Chen
  • Patent number: 10685220
    Abstract: 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: Grant
    Filed: February 23, 2018
    Date of Patent: June 16, 2020
    Assignee: Wistron Corp.
    Inventors: Yu-Ren Lai, Po Chun Chen, Ching-An Cho, Kuo Ting Huang, Yu-Yen Chen
  • Publication number: 20190385314
    Abstract: 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: Application
    Filed: October 9, 2018
    Publication date: December 19, 2019
    Applicant: Wistron Corporation
    Inventors: Ching-An Cho, Kuo-Ting Huang
  • Publication number: 20190304080
    Abstract: 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: Application
    Filed: July 4, 2018
    Publication date: October 3, 2019
    Applicant: Wistron Corporation
    Inventors: Zhen-Te Liu, Ching-An Cho
  • Patent number: 10423848
    Abstract: 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: Grant
    Filed: August 7, 2017
    Date of Patent: September 24, 2019
    Assignee: Wistron Corporation
    Inventors: You-Jyun Syu, Ching-An Cho, Ming-Che Ho
  • Patent number: 10360943
    Abstract: 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: Grant
    Filed: November 24, 2017
    Date of Patent: July 23, 2019
    Assignee: Wistron Corporation
    Inventors: Chia-Ta Hsieh, Ching-An Cho, Zhen-Te Liu
  • Publication number: 20190155454
    Abstract: 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: Application
    Filed: January 30, 2019
    Publication date: May 23, 2019
    Applicant: Wistron Corporation
    Inventors: You-Jyun Syu, Ching-An Cho, Kuo-Ting Huang, Yu-Yen Chen
  • Publication number: 20190122038
    Abstract: 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: Application
    Filed: February 23, 2018
    Publication date: April 25, 2019
    Inventors: Yu-Ren LAI, Po Chun CHEN, Ching-An CHO, Kuo Ting HUANG, Yu-Yen CHEN