Patents by Inventor Chang Kyu Choi

Chang Kyu Choi 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).

  • FACE VERIFICATION METHOD AND APPARATUS
    Publication number: 20200320280
    Abstract: Disclosed is a face verification method and apparatus. The method including analyzing a current frame of a verification image, determining a current frame state score of the verification image indicating whether the current frame is in a state predetermined as being appropriate for verification, determining whether the current frame state score satisfies a predetermined validity condition, and selectively, based on a result of the determining of whether the current frame state score satisfies the predetermined validity condition, extracting a feature from the current frame and performing verification by comparing a determined similarity between the extracted feature and a registered feature to a set verification threshold.
    Type: Application
    Filed: June 18, 2020
    Publication date: October 8, 2020
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Changyong SON, Wonsuk CHANG, Deoksang KIM, Dae-Kyu SHIN, Byungin YOO, Seungju HAN, Jaejoon HAN, Jinwoo SON, Chang Kyu CHOI
  • Method of displaying menu based on depth information and space gesture of user
    Patent number: 10795568
    Abstract: A method of displaying a menu based on at least one of a depth information and a space gesture is provided. The method including determining depth information corresponding to a distance from a screen of a user terminal to a hand of a user; identifying at least one layer among a plurality of layers based on the depth information; and applying a graphic effect to the identified layer so that a menu page corresponding to the at least one identified layer is displayed on the screen of the user terminal.
    Type: Grant
    Filed: April 30, 2018
    Date of Patent: October 6, 2020
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Keun Joo Park, Hyun Surk Ryu, Chang Kyu Choi, Joon Ah Park
  • Liveness test method and apparatus
    Patent number: 10789455
    Abstract: A liveness test method and apparatus is disclosed. A processor implemented liveness test method includes extracting an interest region of an object from a portion of the object in an input image, performing a liveness test on the object using a neural network model-based liveness test model, the liveness test model using image information of the interest region as provided first input image information to the liveness test model and determining liveness based at least on extracted texture information from the information of the interest region by the liveness test model, and indicating a result of the liveness test.
    Type: Grant
    Filed: October 1, 2018
    Date of Patent: September 29, 2020
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Byungin Yoo, Youngjun Kwak, Jungbae Kim, Jinwoo Son, Changkyo Lee, Chang Kyu Choi, Jaejoon Han
  • AUTHENTICATION METHOD AND APPARATUS WITH TRANSFORMATION MODEL
    Publication number: 20200293886
    Abstract: An authentication method and apparatus using a transformation model are disclosed. The authentication method includes generating, at a first apparatus, a first enrolled feature based on a first feature extractor, obtaining a second enrolled feature to which the first enrolled feature is transformed, determining an input feature by extracting a feature from input data with a second feature extractor different from the first feature extractor, and performing an authentication based on the second enrolled feature and the input feature.
    Type: Application
    Filed: March 6, 2020
    Publication date: September 17, 2020
    Applicants: SAMSUNG ELECTRONICS CO., LTD., SNU R&DB FOUNDATION
    Inventors: Seungju HAN, Jaejoon HAN, Minsu KO, Chang Kyu CHOI, Bohyung HAN
  • Method and apparatus for authentication based on fingerprint recognition
    Patent number: 10764280
    Abstract: A fingerprint recognition based authentication method and apparatus is disclosed. The authentication apparatus may obtain an input fingerprint from a touch input of a user, determine an input number corresponding to the input fingerprint using preregistered fingerprint-number mapping information, and authenticate the user based on whether an input number sequence corresponding to an input fingerprint sequence is identical to a reference number sequence.
    Type: Grant
    Filed: January 20, 2016
    Date of Patent: September 1, 2020
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Wonjun Kim, Chilhee Chung, Jung-Bae Kim, Chang Kyu Choi, Seungju Han
  • Method and apparatus to reduce neural network
    Patent number: 10755162
    Abstract: A method to reduce a neural network includes: adding a reduced layer, which is reduced from a layer in the neural network, to the neural network; computing a layer loss and a result loss with respect to the reduced layer based on the layer and the reduced layer; and determining a parameter of the reduced layer based on the layer loss and the result loss.
    Type: Grant
    Filed: May 2, 2017
    Date of Patent: August 25, 2020
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Seung Ju Han, Jung Bae Kim, Jae Joon Han, Chang Kyu Choi
  • Convolutional neural network processing method and apparatus
    Patent number: 10755126
    Abstract: A convolutional neural network (CNN) processing method and apparatus. The apparatus may select, based on at least one of a characteristic of at least one kernel of a convolution layer or a characteristic of an input of the convolution layer, one operation mode from a first operation mode reusing a kernel, of the at least one kernel, and a second operation mode reusing the input, and perform a convolution operation based on the selected operation mode.
    Type: Grant
    Filed: October 31, 2017
    Date of Patent: August 25, 2020
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jinwoo Son, Changyong Son, Chang Kyu Choi, Jaejoon Han
  • METHOD AND APPARATUS FOR DETECTING FAKE FINGERPRINT, AND METHOD AND APPARATUS FOR RECOGNIZING FINGERPRINT
    Publication number: 20200257884
    Abstract: An apparatus and method for detecting a fake fingerprint is disclosed. The apparatus may divide an input fingerprint image into blocks, determine an image quality assessment (IQA) value associated with each block, determine a confidence value based on the IQA values using a confidence determination model, and determine whether an input fingerprint in the input fingerprint image is a fake fingerprint based on the determined confidence value.
    Type: Application
    Filed: April 28, 2020
    Publication date: August 13, 2020
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Wonjun KIM, Youngsung KIM, Sungjoo SUH, Hyungsuk KIM, Chang Kyu CHOI
  • Face verification method and apparatus
    Patent number: 10733424
    Abstract: Disclosed is a face verification method and apparatus. The method including analyzing a current frame of a verification image, determining a current frame state score of the verification image indicating whether the current frame is in a state predetermined as being appropriate for verification, determining whether the current frame state score satisfies a predetermined validity condition, and selectively, based on a result of the determining of whether the current frame state score satisfies the predetermined validity condition, extracting a feature from the current frame and performing verification by comparing a determined similarity between the extracted feature and a registered feature to a set verification threshold.
    Type: Grant
    Filed: December 6, 2017
    Date of Patent: August 4, 2020
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Changyong Son, Wonsuk Chang, Deoksang Kim, Dae-Kyu Shin, Byungin Yoo, Seungju Han, Jaejoon Han, Jinwoo Son, Chang Kyu Choi
  • PRINTED CIRCUIT BOARD WITH CAVITY
    Publication number: 20200245465
    Abstract: An electronic device includes a printed circuit board (PCB) defining a cavity, a first component pad of the PCB positioned outside the cavity, and a second component pad of the PCB positioned on a bottom surface of the cavity. The first component pad has a first thickness, and the second component pad has a second thickness that is less than the first thickness of the first component pad. An electronic component, such as a surface mounted technology (SMT) component, is mounted to the second component pad within the cavity.
    Type: Application
    Filed: January 29, 2019
    Publication date: July 30, 2020
    Inventors: Dingyou Zhang, Nitesh Kumbhat, Li Sun, Sarah Haney, Chang Kyu Choi
  • Method and apparatus to recognize user
    Patent number: 10726261
    Abstract: Disclosed is a user recognition apparatus and method, the apparatus configured to determine a validity of an iris area for each frame, to perform an iris recognition when the iris area is valid, and to extract a facial feature for a fusion recognition when the iris area is invalid.
    Type: Grant
    Filed: October 24, 2017
    Date of Patent: July 28, 2020
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hyunjeong Lee, Sungjoo Suh, Changyong Son, Chang Kyu Choi, Jaejoon Han
  • METHOD AND APPARATUS WITH LIVENESS DETECTION AND OBJECT RECOGNITION
    Publication number: 20200210690
    Abstract: A processor-implemented liveness detection method includes: obtaining an initial image using a dual pixel sensor; obtaining a left image and a right image from the initial image; and detecting liveness of an object included in the initial image using the left image and the right image.
    Type: Application
    Filed: December 9, 2019
    Publication date: July 2, 2020
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Jaejoon HAN, Hana LEE, Jihye KIM, Jingtao XU, Chang Kyu CHOI, Hangkai TAN, Jiaqian YU
  • USER VERIFICATION METHOD AND APPARATUS USING GENERALIZED USER MODEL
    Publication number: 20200210556
    Abstract: A user verification method and apparatus using a generalized user model is disclosed, where the user verification method includes generating a feature vector corresponding to a user based on input data corresponding to the user, determining a first parameter indicating a similarity between the feature vector and an enrolled feature vector enrolled for user verification, determining a second parameter indicating a similarity between the feature vector and a user model corresponding to generalized users, and verifying the user based on the first parameter and the second parameter.
    Type: Application
    Filed: August 20, 2019
    Publication date: July 2, 2020
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Dohwan LEE, Kyuhong KIM, Chang Kyu CHOI
  • APPARATUS AND METHOD WITH USER VERIFICATION
    Publication number: 20200210685
    Abstract: A processor-implemented verification method includes: detecting a characteristic of an input image; acquiring input feature transformation data and enrolled feature transformation data by respectively transforming input feature data and enrolled feature data based on the detected characteristic, wherein the input feature data is extracted from the input image using a feature extraction model; and verifying a user corresponding to the input image based on a result of comparison between the input feature transformation data and the enrolled feature transformation data.
    Type: Application
    Filed: December 27, 2019
    Publication date: July 2, 2020
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Minsu KO, Seungju HAN, Wonsuk CHANG, Jaejoon HAN, Seon Min RHEE, Chang Kyu CHOI
  • NEURAL NETWORK APPARATUS AND METHOD WITH BITWISE OPERATION
    Publication number: 20200202200
    Abstract: A processor-implemented neural network processing method includes: obtaining a kernel bit-serial block corresponding to first data of a weight kernel of a layer in a neural network; generating a feature map bit-serial block based on second data of one or more input feature maps of the layer; and generating at least a portion of an output feature map by performing a convolution operation of the layer using a bitwise operation between the kernel bit-serial block and the feature map bit-serial block.
    Type: Application
    Filed: August 16, 2019
    Publication date: June 25, 2020
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Jinwoo SON, Changyong SON, Seohyung LEE, Sangil JUNG, Chang Kyu CHOI, Jaejoon HAN
  • NEURAL NETWORK PROCESSING METHOD AND APPARATUS BASED ON NESTED BIT REPRESENTATION
    Publication number: 20200202199
    Abstract: A neural network processing method and apparatus based on nested bit representation is provided. The processing method includes obtaining first weights for a first layer of a source model of a first layer of a neural network, determining a bit-width for the first layer of the neural network, obtaining second weights for the first layer of the neural network by extracting at least one bit corresponding to the determined bit-width from each of the first weights for the first layer of a source model corresponding to the first layer of the neural network, and processing input data of the first layer of the neural network by executing the first layer of the neural network based on the obtained second weights.
    Type: Application
    Filed: August 12, 2019
    Publication date: June 25, 2020
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Seohyung LEE, Youngjun KWAK, Jinwoo SON, Changyong SON, Sangil JUNG, Chang Kyu CHOI, Jaejoon HAN
  • METHOD AND APPARATUS FOR GAZE ESTIMATION
    Publication number: 20200202562
    Abstract: A gaze estimation method includes receiving, by a processor, input data including a current image and a previous image each including a face of a user, determining, by the processor, a gaze mode indicating a relative movement between the user and a camera that captured the current image and the previous image based on the input data, and estimating, by the processor, a gaze of the user based on the determined gaze mode, wherein the determined gaze mode is one of a plurality of gaze modes comprising a stationary mode and a motion mode.
    Type: Application
    Filed: December 20, 2019
    Publication date: June 25, 2020
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Tianchu GUO, Hui ZHANG, Xiabing LIU, Chang Kyu CHOI, Jaejoon HAN, Yongchao LIU
  • Method and apparatus for detecting fake fingerprint, and method and apparatus for recognizing fingerprint
    Patent number: 10691918
    Abstract: An apparatus and method for detecting a fake fingerprint is disclosed. The apparatus may divide an input fingerprint image into blocks, determine an image quality assessment (IQA) value associated with each block, determine a confidence value based on the IQA values using a confidence determination model, and determine whether an input fingerprint in the input fingerprint image is a fake fingerprint based on the determined confidence value.
    Type: Grant
    Filed: March 22, 2016
    Date of Patent: June 23, 2020
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Wonjun Kim, Youngsung Kim, Sungjoo Suh, Hyungsuk Kim, Chang Kyu Choi
  • User authentication method using fingerprint image and method of generating coded model for user authentication
    Patent number: 10691909
    Abstract: A user authentication method using a fingerprint image, the user authentication method includes receiving at least a portion of a fingerprint image of a user; actuating a processor to divide the fingerprint image into a plurality of first sub-blocks; generate a set of input codes by encoding the first sub-blocks based on a coded model; measure a similarity between the set of the input codes and a set of registered codes included in a pre-registered binary codebook; and authenticate the user based on the similarity.
    Type: Grant
    Filed: July 19, 2017
    Date of Patent: June 23, 2020
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Namjoon Kim, Kyuhong Kim, Chang Kyu Choi
  • GENERATIVE MODEL TRAINING AND IMAGE GENERATION APPARATUS AND METHOD
    Publication number: 20200134383
    Abstract: An apparatus for training an image generative model and an image generating apparatus are provided. The apparatus generates output images from a plurality of input images based on the generative model, extracts depth features from the respective output images based on a depth classification model, calculates a depth loss from the extracted depth features, and trains the generative model based on an overall loss that includes the calculated depth loss.
    Type: Application
    Filed: October 8, 2019
    Publication date: April 30, 2020
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Seon Min RHEE, Minsu KO, Jihye KIM, Byung In YOO, Chang Kyu CHOI, Jaejoon HAN