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).

  • Device and method of recognizing iris
    Patent number: 10395112
    Abstract: A device and method of recognizing an iris is provided. An iris recognition device may determine a threshold brightness using a histogram of a reference area from an iris image and exclude a target pixel from iris recognition in a candidate area based on the determined threshold brightness.
    Type: Grant
    Filed: August 9, 2017
    Date of Patent: August 27, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hyunjeong Lee, Jihye Kim, Sungjoo Suh, Chang Kyu Choi
  • Method of extracting feature of image to recognize object
    Patent number: 10395098
    Abstract: A method of converting a vector corresponding to an input image includes receiving input vector data associated with an input image including an object; and converting the received input vector data into feature data based on a projection matrix having a fixed rank, wherein a first dimension of the input vector data is higher than a second dimension of the feature data.
    Type: Grant
    Filed: September 19, 2016
    Date of Patent: August 27, 2019
    Assignees: SAMSUNG ELECTRONICS CO., LTD., NORTHEASTERN UNIVERSITY
    Inventors: Wonjun Hwang, Sungjoo Suh, Jaejoon Han, Chang Kyu Choi, Yun Fu, Zhengming Ding, Ming Shao
  • Face verifying method and apparatus
    Patent number: 10387714
    Abstract: A face verifying method and apparatus. The face verifying method includes detecting a face region from an input image, generating a synthesized face image by combining image information of the face region and reference image information, based on a determined masking region, extracting one or more face features from the face region and the synthesized face image, performing a verification operation with respect to the one or more face features and predetermined registration information, and indicating whether verification of the input image is successful based on a result of the performed verification operation.
    Type: Grant
    Filed: February 5, 2018
    Date of Patent: August 20, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Seungju Han, Minsu Ko, Deoksang Kim, Chang Kyu Choi, Jaejoon Han
  • Method and apparatus for recognizing facial expression
    Patent number: 10387716
    Abstract: A method and apparatus for recognizing a facial expression is provided. The method of recognizing the facial expression includes extracting a feature from an input image, extracting a feature from a reference image, and recognizing a user facial expression based on a difference between the feature of the input image and the feature of the reference image.
    Type: Grant
    Filed: March 23, 2017
    Date of Patent: August 20, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Youngsung Kim, Byungin Yoo, Youngjun Kwak, Chang Kyu Choi
  • METHOD AND APPARATUS OF PERFORMING AUTHENTICATION
    Publication number: 20190251239
    Abstract: A processor-implemented method of performing authentication includes obtaining a first biometric information of a user according to a first modality; calculating a first score based on the first biometric information; filtering the first score; determining whether the filtered first score satisfies a second condition; and selectively, based on a result of the determining, authenticating the user based on the first score and a first condition corresponding to the first modality. The second condition is different from the first condition.
    Type: Application
    Filed: January 17, 2019
    Publication date: August 15, 2019
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Jihye KIM, Seungju HAN, Jaejoon HAN, Chang Kyu CHOI
  • METHOD AND APPARATUS WITH SELECTIVE COMBINED AUTHENTICATION
    Publication number: 20190251245
    Abstract: A method and apparatus with selective combined authentication performs a single authentication based on a first modality among plural modalities, and in response to the single authentication having failed, determines whether to perform a combined authentication by a combination of two or more of the plural modalities, and selectively, depending on a result of the determining of whether to perform the combined authentication, performs the combined authentication.
    Type: Application
    Filed: February 7, 2019
    Publication date: August 15, 2019
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Jihye KIM, Seungju HAN, Jaejoon HAN, Minsu KO, SungUn PARK, Chang Kyu CHOI
  • METHOD AND APPARATUS WITH IMAGE FUSION
    Publication number: 20190251684
    Abstract: Disclosed is an image fusion method and apparatus. The fusion method includes detecting first feature points of an object in a first image frame from the first image frame; transforming the first image frame based on the detected first feature points and predefined reference points to generate a transformed first image frame; detecting second feature points of the object in a second image frame from the second image frame; transforming the second image frame based on the detected second feature points and the predefined reference points to generate a transformed second image frame; and generating a combined image by combining the transformed first image frame and the transformed second image frame.
    Type: Application
    Filed: December 18, 2018
    Publication date: August 15, 2019
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Minsu KO, Seungju HAN, Jaejoon HAN, Jihye KIM, SungUn PARK, Chang Kyu CHOI
  • HIGH-SPEED PROCESSING METHOD OF NEURAL NETWORK AND APPARATUS USING THE HIGH-SPEED PROCESSING METHOD
    Publication number: 20190251436
    Abstract: A processing method using a neural network includes generating output maps of a current layer of the neural network by performing a convolution operation between input maps of the current layer and weight kernels of the current layer, determining a lightweight format for the output maps of the current layer based on a distribution of at least a portion of activation data being processed in the neural network, and lightening activation data corresponding to the output maps of the current layer to have a low bit width based on the determined lightweight format.
    Type: Application
    Filed: February 12, 2019
    Publication date: August 15, 2019
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: ChangYong SON, Jinwoo SON, Sangil JUNG, Chang Kyu CHOI, Jae-Joon HAN
  • Device and method to generate image using image learning model
    Patent number: 10360467
    Abstract: At least some example embodiments disclose a device and a method for generating a synthetic image and a different-angled image and eliminating noise. The method may include receiving input images, extracting feature values corresponding to the input images using an image learning model, the image learning model permitting an input and an output to be identical and generating a synthetic image based on the feature values corresponding to the input images using the image learning model.
    Type: Grant
    Filed: November 3, 2015
    Date of Patent: July 23, 2019
    Assignees: SAMSUNG ELECTRONICS CO., LTD., KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Byungin Yoo, Jun Ho Yim, Jun Mo Kim, Hee Chul Jung, Chang Kyu Choi, Jaejoon Han
  • Image recognition method and apparatus, image verification method and apparatus, learning method and apparatus to recognize image, and learning method and apparatus to verify image
    Patent number: 10346726
    Abstract: A method of recognizing a feature of an image may include receiving an input image including an object; extracting first feature information using a first layer of a neural network, the first feature information indicating a first feature corresponding to the input image among a plurality of first features; extracting second feature information using a second layer of the neural network, the second feature information indicating a second feature among a plurality of second features, the indicated second feature corresponding to the first feature information; and recognizing an element corresponding to the object based on the first feature information and the second feature information.
    Type: Grant
    Filed: December 3, 2015
    Date of Patent: July 9, 2019
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Seungju Han, Sungjoo Suh, Jaejoon Han, Chang Kyu Choi
  • METHOD AND APPARATUS WITH EXPRESSION RECOGNITION
    Publication number: 20190205626
    Abstract: A processor-implemented method includes obtaining an input image including a face of a user, extracting a feature from the input image, estimating a facial expression of the input image and an expressiveness of the facial expression of the input image corresponding to a determined expression intensity of the facial expression based on the extracted feature, normalizing the expressiveness of the facial expression of the input image to a universal expressiveness, and recognizing the facial expression based on the universal expressiveness.
    Type: Application
    Filed: October 23, 2018
    Publication date: July 4, 2019
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Youngsung KIM, Chang Kyu CHOI, ByungIn YOO
  • Fingerprint recognition method and apparatus
    Patent number: 10339178
    Abstract: A fingerprint recognition method includes generating an enrollment modified image by modifying a fingerprint image corresponding to a fingerprint to be enrolled; extracting enrollment property information from the fingerprint image; generating mapping information that maps the enrollment modified image to the enrollment property information; and storing the enrollment modified image and the enrollment property information.
    Type: Grant
    Filed: April 15, 2016
    Date of Patent: July 2, 2019
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Namjoon Kim, Sungjoo Suh, Wonjun Kim, Hyunjeong Lee, Chang Kyu Choi
  • LIVENESS TEST METHOD AND APPARATUS
    Publication number: 20190197331
    Abstract: A processor-implemented liveness test method includes detecting a face region in a query image, the query image including a test object for a liveness test, determining a liveness test condition to be applied to the test object among at least one liveness test condition for at least one registered user registered in a registration database, determining at least one test region in the query image based on the detected face region and the determined liveness test condition, obtaining feature data of the test object from image data of the determined at least one test region using a neural network-based feature extractor, and determining a result of the liveness test based on the obtained feature data and registered feature data registered in the registration database and corresponding to the determined liveness test condition.
    Type: Application
    Filed: December 19, 2018
    Publication date: June 27, 2019
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Youngjun KWAK, Byung In YOO, Youngsung KIM, Chang Kyu CHOI, Jaejoon HAN
  • OBJECT RECOGNITION METHOD AND APPARATUS
    Publication number: 20190188510
    Abstract: An object recognition apparatus and method are provided. The apparatus includes a processor configured to verify a target image using an object model and based on reference intermediate data extracted by a partial layer of the object model as used in an object recognition of an input image, in response to a failure of a verification of the input image after a success of the object recognition of the input image, and perform an additional verification of the target image in response to the target image being verified in the verifying of the target image.
    Type: Application
    Filed: October 31, 2018
    Publication date: June 20, 2019
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: SeungJu HAN, SungUn PARK, JaeJoon HAN, Jinwoo SON, ChangYong SON, Minsu KO, Jihye KIM, Chang Kyu CHOI
  • Method and apparatus for user interface using gaze interaction
    Patent number: 10324524
    Abstract: A method and apparatus for a user interface using a gaze interaction is disclosed. The method for the user interface using the gaze interaction may include obtaining an image including eyes of a user, estimating a gaze position of the user, using the image including the eyes of the user, and determining whether to activate a gaze adjustment function for controlling a device by a gaze of the user, based on the gaze position of the user with respect to at least one toggle area on a display.
    Type: Grant
    Filed: January 27, 2014
    Date of Patent: June 18, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Chang Kyu Choi, Sung Joo Suh, Joon Ah Park, Du Sik Park
  • DEVICE AND METHOD TO REGISTER USER
    Publication number: 20190180128
    Abstract: A user registration device and method is disclosed. The user registration device compares an initial image stored in a database and a newly input candidate image, and determines whether to generate and manage an additional database based on the similarity between the initial image and the candidate image.
    Type: Application
    Filed: September 18, 2018
    Publication date: June 13, 2019
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Seungju HAN, Minsu KO, Chang Kyu CHOI, Jaejoon HAN, Wonsuk CHANG
  • FINGERPRINT ENROLLMENT METHOD AND APPARATUS
    Publication number: 20190163954
    Abstract: A processor fingerprint enrollment method and apparatus is disclosed. A processor implemented fingerprint enrollment method includes performing a matching between a received input fingerprint image of a user and one or more enrolled fingerprint images, and selectively, based on a result of the matching identifying a matched enrolled fingerprint image from the one or more enrolled fingerprint image and based on a calculated degree of diversity in the fingerprint corresponding to an overlapping region between the input fingerprint image and the matched enrolled fingerprint image, storing the input fingerprint as another enrolled fingerprint image.
    Type: Application
    Filed: January 16, 2019
    Publication date: May 30, 2019
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Kyuhong KIM, Namjoon KIM, Chang Kyu CHOI
  • FACIAL VERIFICATION METHOD AND APPARATUS
    Publication number: 20190147227
    Abstract: A facial verification method includes separating a query face image into color channel images of different color channels, obtaining a multi-color channel target face image with a reduced shading of the query face image based on a smoothed image and a gradient image of each of the color channel images, extracting a face feature from the multi-color channel target face image, and determining whether face verification is successful based on the extracted face feature.
    Type: Application
    Filed: October 23, 2018
    Publication date: May 16, 2019
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Minsu KO, SeungJu HAN, JaeJoon HAN, Chang Kyu CHOI
  • OBJECT LEARNING AND RECOGNITION METHOD AND SYSTEM
    Publication number: 20190122385
    Abstract: An object recognition apparatus, a classification tree learning apparatus, an operation method of the object recognition apparatus, and an operation method of the classification tree learning apparatus are provided. The object recognition apparatus may include an input unit to receive, as an input, a depth image representing an object to be analyzed, and a processing unit to recognize a visible object part and a hidden object part of the object, from the depth image, using a classification tree.
    Type: Application
    Filed: December 18, 2018
    Publication date: April 25, 2019
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Byung In YOO, Chang Kyu CHOI, Chang Kyo LEE, Jae Joon HAN
  • Method of obtaining depth information and display apparatus
    Patent number: 10257506
    Abstract: A method of obtaining depth information and a display apparatus may adjust a sensor area of a sensor panel based on a distance from an object, and may obtain depth information of the object based on the adjusted sensor area.
    Type: Grant
    Filed: November 5, 2013
    Date of Patent: April 9, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sung Joo Suh, Chang Kyu Choi, Du Sik Park