Patents by Inventor Ji Sang Yoo
Ji Sang Yoo 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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Publication number: 20240071070Abstract: Provided is an image recognition method including the steps of: for a deep learning network that carries out object recognition on a random image, carrying out quantization corresponding to the number of a plurality of different bits to generate a plurality of quantization models respectively corresponding to the number of bits; receiving image data as an input for the deep learning network; determining the uncertainty of the input image data; selecting any one of the plurality of quantization models on the basis of the determined uncertainty; and recognizing an object from the image data by using the selected quantization model, and outputting, as the result of the object recognition, a label corresponding to the image data.Type: ApplicationFiled: December 30, 2021Publication date: February 29, 2024Inventors: Ook Sang YOO, Ji Yea CHON, Hyuk Jae LEE, Kyeong Jong LIM
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Patent number: 11227374Abstract: According to the present disclosure, an apparatus for real-time object detection in an image captured by an unmanned aerial vehicle (UAV) including an image splitter configured to receive an input image and split the input image into a left image and a right image; and an object detector configured to detect an object from each of the left image and the right image provided from the image splitter is provided.Type: GrantFiled: December 12, 2019Date of Patent: January 18, 2022Assignee: KWANGWOON UNIVERSITY INDUSTRY-ACADEMIC COLLABORATION FOUNDATIONInventors: Seong Kyun Han, Ji Sang Yoo, Soon Chul Kwon
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Publication number: 20210166367Abstract: According to the present disclosure, an apparatus for real-time object detection in an image captured by an unmanned aerial vehicle (UAV) including an image splitter configured to receive an input image and split the input image into a left image and a right image; and an object detector configured to detect an object from each of the left image and the right image provided from the image splitter is provided.Type: ApplicationFiled: December 12, 2019Publication date: June 3, 2021Applicant: Kwangwoon University Industry-Academic Collaboration FoundationInventors: Seong Kyun HAN, Ji Sang YOO, Soon Chul KWON
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Patent number: 10824914Abstract: An apparatus for generating data based on generative adversarial networks (GANs) is provided. The apparatus includes a first generator configured to receive input data and generate a first fake image, a first discriminator configured to receive the first fake image generated by the first generator and a first real image and verify whether an image is fake or real, a second generator configured to receive the first fake image and generate a second fake image; and a second discriminator configured to receive the second fake image and a second real image and verify whether an image received by the second discriminator is fake or real. The apparatus improves an object recognition performance as compared with a typical object recognition algorithm by generating an image of a class of which a sufficient database is not secured so as to reduce an object misrecognition caused by an insufficient amount of data.Type: GrantFiled: December 4, 2018Date of Patent: November 3, 2020Assignee: KWANGWOON UNIVERSITY INDUSTRY-ACADEMIC COLLABORATION FOUNDATIONInventors: Ji Sang Yoo, Ju Won Kwon
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Publication number: 20200012896Abstract: Provided is an apparatus for generating data based on generative adversarial networks (GANs), the apparatus including a first generator configured to receive input data and generate a first fake image and a first discriminator configured to receive the first fake image generated by the first generator and a first real image and verify whether an image is fake or real.Type: ApplicationFiled: December 4, 2018Publication date: January 9, 2020Applicant: Kwangwoon University Industry-Academic Collaboration FoundationInventors: Ji Sang YOO, Ju Won KWON
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Patent number: 10187630Abstract: An egomotion estimation system may include: a stereo camera suitable for acquiring a stereo image; a map generation unit suitable for generating a depth map and a disparity map using the stereo image; a feature point extraction unit suitable for extracting a feature point from a moving object in the stereo image using the disparity map; a motion vector detection unit suitable for detecting a motion vector of the extracted feature vector point; an error removing unit suitable for removing an error of the detected motion vector; and an egomotion determination unit suitable for calculating and determine an egomotion using the error-removed motion vector.Type: GrantFiled: April 27, 2016Date of Patent: January 22, 2019Assignees: SK Hynix Inc., KWANGWOON UNIVERSITY INDUSTRY ACADEMIC COLLABORATION FOUNDATIONInventors: Ji Sang Yoo, Seung Woo Seo
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Patent number: 9984297Abstract: An object detection device may include: a candidate object selection unit suitable for selecting candidate objects from a stereo image transmitted from moving cameras; a global motion estimation unit suitable for estimating global motions representing movement of the moving cameras from the stereo image; and an object determination unit suitable for detecting a moving object from the stereo image based on the candidate objects and the global motions.Type: GrantFiled: December 4, 2015Date of Patent: May 29, 2018Assignees: SK Hynix Inc., KWANGWOON UNIVERSITY INDUSTRY ACADEMIC COLLABORATION FOUNDATIONInventors: Ji Sang Yoo, Gyu Cheol Lee
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Publication number: 20170161912Abstract: An egomotion estimation system may include: a stereo camera suitable for acquiring a stereo image; a map generation unit suitable for generating a depth map and a disparity map using the stereo image; a feature point extraction unit suitable for extracting a feature point from a moving object in the stereo image using the disparity map; a motion vector detection unit suitable for detecting a motion vector of the extracted feature vector point; an error removing unit suitable for removing an error of the detected motion vector; and an egomotion determination unit suitable for calculating and determine an egomotion using the error-removed motion vector.Type: ApplicationFiled: April 27, 2016Publication date: June 8, 2017Inventors: Ji Sang YOO, Seung Woo SEO
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Publication number: 20160358018Abstract: An object detection device may include: a candidate object selection unit suitable for selecting candidate objects from a stereo image transmitted from moving cameras; a global motion estimation unit suitable for estimating global motions representing movement of the moving cameras from the stereo image; and an object determination unit suitable for detecting a moving object from the stereo image based on the candidate objects and the global motions.Type: ApplicationFiled: December 4, 2015Publication date: December 8, 2016Inventors: Ji Sang YOO, Gyu Cheol LEE
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Publication number: 20110115790Abstract: The present inventive concept can be used in a wide range of applications, including: mobile devices, such as mobile phones; an image processing apparatus or processor and computer programs, including a member for converting 2D image signals into 3D image signals or using an algorism for converting 2D image signals into 3D image signals.Type: ApplicationFiled: August 26, 2008Publication date: May 19, 2011Applicants: ENHANCED CHIP TECHNOLOGY INC, KWANGWOON UNIVERSITY INDUSTRY-ACADEMIC COLLABORATION FOUNDATIONInventors: Ji Sang Yoo, Yun Ki Baek, Se Hwan Park, Jung Hwan Yun, Yong Hyub Oh, Jong Dae Kim, Sung Moon Chun, Tae Sup Jung
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Patent number: 7652152Abstract: A method of preparing optically pure (S)-3-hydroxypyrrolidine is disclosed. The present invention provides a method of economically and industrially preparing optically and chemically pure (S)-3-hydroxypyrrolidine, through a process comprising introducing an amine protecting group by using optically pure 4-amino-(S)-2-hydroxybutylic acid as a starting material, reducing a carboxylic acid group into a primary alcohol, removing the amine protecting group to form an amine salt, halogenating the primary alcohol, and amine cyclization; and through a simple purification process, i.e., distillation under reduced pressure. As another method, the present invention provides a method of preparing optically and chemically pure (S)-3-hydroxypyrrolidine, through a process comprising esterifying optically pure 4-amino-(S)-2-hydroxybutylic acid as a starting material, lactam cyclization, and reduction.Type: GrantFiled: July 19, 2006Date of Patent: January 26, 2010Assignee: Chiroad IncorporateInventors: Kyoung Rok Roh, Ji Sang Yoo, Jong Won Jang, Dae Yon Lee
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Publication number: 20080214837Abstract: A method of preparing optically pure (S)-3-hydroxypyrrolidine is disclosed. The present invention provides a method of economically and industrially preparing optically and chemically pure (S)-3-hydroxypyrrolidine, through a process comprising introducing an amine protecting group by using optically pure 4-amino-(S)-2-hydroxybutylic acid as a starting material, reducing a carboxylic acid group into a primary alcohol, removing the amine protecting group to form an amine salt, halogenating the primary alcohol, and amine cyclization; and through a simple purification process, i.e., distillation under reduced pressure. As another method, the present invention provides a method of preparing optically and chemically pure (S)-3-hydroxypyrrolidine, through a process comprising esterifying optically pure 4-amino-(S)-2-hydroxybutylic acid as a starting material, lactam cyclization, and reduction.Type: ApplicationFiled: July 19, 2006Publication date: September 4, 2008Inventors: Kyoung Rok Roh, Ji Sang Yoo, Jong Won Jang, Dae Yon Lee
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Patent number: 5889556Abstract: A method of automatically dividing the domain of a motion picture is disclosed including the steps of: quantizing at least two sequential picture frames, and simplifying the shapes of the quantized picture frames; obtaining time space slope information from the quantized and simplified picture frames; detecting divides of the picture from the time space gradient information, and obtaining the boundaries between the divides, so as to divide the picture into multiple regions; combining neighboring smaller regions using graph theory, to thereby reduce the number of the divided regions; and dividing the regions into a motionless background object and moving objects, using motion information of the combined regions.Type: GrantFiled: April 29, 1997Date of Patent: March 30, 1999Assignee: Electronics and Telecommunications Research InstituteInventors: Young-Kwon Lim, Myoung-Ho Lee, Jae-Gark Choi, Gun Bang, Ji-Sang Yoo