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).

  • Patent number: 10418514
    Abstract: Exemplary embodiments of the present invention disclose a light emitting diode including an n-type contact layer doped with silicon, a p-type contact layer, an active region disposed between the n-type contact layer and the p-type contact layer, a superlattice layer disposed between the n-type contact layer and the active region, the superlattice layer including a plurality of layers, an undoped intermediate layer disposed between the superlattice layer and the n-type contact layer, and an electron reinforcing layer disposed between the undoped intermediate layer and the superlattice layer. Only a final layer of the superlattice layer closest to the active region is doped with silicon, and the silicon doping concentration of the final layer is higher than that of the n-type contact layer.
    Type: Grant
    Filed: July 6, 2017
    Date of Patent: September 17, 2019
    Assignee: SEOUL VIOSYS CO., LTD.
    Inventors: Kwang Joong Kim, Chang Suk Han, Kyung Hee Ye, Seung Kyu Choi, Ki Bum Nam, Nam Yoon Kim, Kyung Hae Kim, Ju Hyung Yoon
  • Publication number: 20190279052
    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: Application
    Filed: May 30, 2019
    Publication date: September 12, 2019
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Seungju HAN, Sungjoo Suh, Jaejoon Han, Chang Kyu Choi
  • Publication number: 20190278089
    Abstract: The present invention provides an electronic device, an external input device and a method for connecting the electronic device and the external input device. An electronic device according to various embodiments comprises: a camera module; a communication module, a display, a memory; and a processor electrically connected to the camera module, a communication module, a display and memory, wherein the processor displays, on the display, images comprising a left-eye image and a right-eye image, determines whether or not a connectable external input device is present if an event for the connection with the external input device occurs with respect to the images, displays, on at least one part of the display, external images, obtained by means of the camera module, if a connectable first external input device is present, and can perform connection with the first external input device. Moreover, other embodiments are possible.
    Type: Application
    Filed: November 27, 2017
    Publication date: September 12, 2019
    Inventors: Dong-Il SON, Jong-Chul CHOI, Seung-Nyun KIM, Yong-Sang YUN, Won-Kyu KWON, Chang-Ryong HEO
  • 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
  • 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
  • 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
  • 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
  • Patent number: 10389777
    Abstract: A transmitting apparatus is provided. The transmitting apparatus includes: an L1 signaling generator configured to generate L1 signaling including first information and second information; a frame generator configured to generate a frame including a payload including a plurality of sub frames; and a signal processor configured to insert a preamble including the L1 signaling in the frame and transmit the frame. The first information includes information required for decoding a first sub frame among the plurality of sub frames. Therefore, a processing delay in a receiving apparatus is reduced.
    Type: Grant
    Filed: March 4, 2019
    Date of Patent: August 20, 2019
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jung-hyun Park, Min-ho Kim, Sung-woo Park, Sung-kyu Jung, Chang-hoon Choi, Doo-chan Hwang
  • 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
  • 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
  • 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
  • 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
  • Publication number: 20190237127
    Abstract: A memory device includes a clock receiver configured to receive, from a memory controller, a write clock that is used to receive write data during a data write operation, a duty monitor configured to generate first monitoring information by monitoring a duty of the write clock, and a duty adjuster configured to adjust the duty of the write clock in response to a duty control signal and output an adjusted write clock. The memory device provides the first monitoring information to the memory controller, and receives the duty control signal, generated using the first monitoring information, from the memory controller.
    Type: Application
    Filed: December 21, 2018
    Publication date: August 1, 2019
    Inventors: DAE-SIK MOON, Gil-Hoon Cha, Ki-Seok Oh, Chang-Kyo Lee, Yeon-Kyu Choi, Jung-Hwan Choi, Kyung-Soo Ha, Seok-Hun Hyun
  • 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
  • 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
  • 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
  • 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
  • Patent number: 10341480
    Abstract: A wearable device and corresponding method include producing, at a wearable device, an incoming call processing option list in response to a rejection input from a user rejecting an incoming call from a mobile terminal. The wearable device and corresponding method further transmit, from the wearable device to the mobile terminal, a result value corresponding to a gesture of the user and in response to the incoming call processing option list.
    Type: Grant
    Filed: July 23, 2018
    Date of Patent: July 2, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Chang Mok Choi, Sang Joon Kim, Su-Hyun Na, Yu-Jin Na, Jong Kee Lee, Soon Kyu Jang, Young Ei Cho
  • 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
  • Publication number: 20190199764
    Abstract: A transmitting apparatus is provided. The transmitting apparatus includes: an L1 signaling generator configured to generate L1 signaling including first information and second information; a frame generator configured to generate a frame including a payload including a plurality of sub frames; and a signal processor configured to insert a preamble including the L1 signaling in the frame and transmit the frame. The first information includes information required for decoding a first sub frame among the plurality of sub frames. Therefore, a processing delay in a receiving apparatus is reduced.
    Type: Application
    Filed: March 4, 2019
    Publication date: June 27, 2019
    Applicant: Samsung Electronics Co, Ltd.
    Inventors: Jung-hyun Park, Min-ho Kim, Sung-woo Park, Sung-kyu Jung, Chang-hoon Choi, Doo-chan Hwang