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公开(公告)号：US10122778B2
公开(公告)日：2018-11-06
申请号：US15488224
申请日：2017-04-14
Inventor： Seong Yong Lim , Joo Myoung Seok , Sang Woo Ahn , Yong Ju Cho , Ji Hun Cha
IPC: H04L29/06
Abstract: A method of receiving content in a client is provided. The method may include receiving, from a server, a spatial set identifier (ID) corresponding to a tile group including at least one tile, sending, to the server, a request for first content corresponding to metadata, and receiving, from the server, the first content corresponding to the request.
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公开(公告)号：US11954891B2
公开(公告)日：2024-04-09
申请号：US17363859
申请日：2021-06-30
Applicant: Electronics and Telecommunications Research Institute , IUCF-HYU (Industry-University Cooperation Foundation Hanyang University)
Inventor： Eun Young Chang , Euee Seon Jang , Tian Yu Dong , Ji Hun Cha , Kyu Tae Kim , Jae Young Ahn
CPC classification number: G06T9/001 , G06T3/40 , G06T7/0002
Abstract: Provided is a method of compressing an occupancy map of a three-dimensional (3D) point cloud, and more specifically, a method of compressing an occupancy map of a point cloud in which an occupancy map image of a point cloud existing in a 3D space is compressed based on a compression quality or a patch-by-patch inspection method of the occupancy map image so that compression distortion is minimized when reconstructing the compressed occupancy map image so as to remarkably improve the quality of a reconstructed occupancy map image.
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3.发明授权公开(公告)号：US10181928B2
公开(公告)日：2019-01-15
申请号：US15349709
申请日：2016-11-11
Inventor： Yong Ju Cho , Ji Hun Cha
Abstract: Rate adaptation is carried out using bit error rate (BER) to enable effective multimedia transmission. The BER can be estimated using signal strength in a MAC layer and modulation information (FIGS. 7-9), and can be compatibly used in different wireless networks by means of message standardization.
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公开(公告)号：US09628767B2
公开(公告)日：2017-04-18
申请号：US14323509
申请日：2014-07-03
Inventor： Yong Ju Cho , Sang Woo Ahn , Joo Myoung Seok , Seong Yong Lim , Ji Hun Cha
CPC classification number: H04N9/3194 , G03B21/147 , H04N9/3147 , H04N9/3182
Abstract: The present specification is related to a method for performing multi-projection and a multi-projection system for minimizing a black offset in a multi-projection environment. The present specification provides the method for performing multi-projection comprising estimating the intensity transfer function (ITF) of a plurality of projectors, calculating an optimal black offset threshold for each of the projectors by using each of the ITFs, and applying the optimal black offset threshold to an image projection by each of the projectors.
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公开(公告)号：US11125886B2
公开(公告)日：2021-09-21
申请号：US16708143
申请日：2019-12-09
Applicant: Electronics and Telecommunications Research Institute , INDUSTRY ACADEMY COOPERATION FOUNDATION OF SEJONG UNIVERSITY
Inventor： Yoo La Hwang , Jae Young Ahn , Byoung Sun Lee , Ji Hun Cha , Byung Woon Park , Yong Jun Lee , Cheol Soon Lim
Abstract: The present invention provides a method of performing a position measurement on the basis of a signal from a global navigation satellite system (GNSS). The method includes: receiving initial position information; estimating an initial value of a multipath error through a measurement of the GNSS signal on the basis of the received initial position information; estimating a multipath error from the initial value of the multipath error on the basis of a change in the measurement; removing the estimated multipath error from the measurement of the GNSS signal; and performing the position measurement on the basis of the GNSS measurement from which the multipath error is removed.
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Patent Agency Ranking
6.发明授权Rate adaptation method using bit error rate for multimedia service and apparatus therefor 有权使用多媒体业务误码率的速率自适应方法及其设备公开(公告)号：US09509439B2
公开(公告)日：2016-11-29
申请号：US14391071
申请日：2013-06-11
Inventor： Yong Ju Cho , Ji Hun Cha
CPC classification number: H04L1/0011 , H04L1/0002 , H04L1/0009 , H04L1/0014 , H04L1/0033 , H04L1/0041 , H04L1/203
Abstract: Rate adaptation is carried out using bit error rate (BER) to enable effective multimedia transmission. The BER can be estimated using signal strength in a MAC layer and modulation information (FIGS. 7-9), and can be compatibly used in different wireless networks by means of message standardization.
Abstract translation: 使用误码率（BER）进行速率适配，以实现有效的多媒体传输。 可以使用MAC层中的信号强度和调制信息来估计BER（图7-9），并且可以通过消息标准化在不同的无线网络中兼容地使用BER。
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公开(公告)号：US09030485B2
公开(公告)日：2015-05-12
申请号：US13658039
申请日：2012-10-23
Applicant: Electronics and Telecommunications Research Institute , National University of Sciences & Technology
Inventor： Yong Ju Cho , Yong Ju Lee , Seung Kwon Beack , Ji Hun Cha , Seong Yong Lim , Myung Seok Ki , Joo Myoung Seok , Jin Woong Kim , Muhammad Murtaza Khan , Rehan Hafiz , Haris Anis , Mutahir Latif , Ashar Rasul , Arshad Ali
IPC: G09G5/00 , G09G5/02 , G09G5/36 , H04N5/46 , H04N1/46 , H04N1/40 , G03F3/08 , G06K9/00 , G06K9/40 , G06K9/36 , H04N9/31 , G06F3/14
CPC classification number: H04N9/3147 , G06F3/1446 , G09G2320/0233 , G09G2320/0285 , G09G2320/0693 , H04N9/3182 , H04N9/3194
Abstract: An apparatus and a method for correcting colors of an image projection device are provided. The method includes: acquiring a photographed image by photographing a sample image projected on projection surface; generating input-output color information for n regions, based on color values of a block in the sample image and corresponding color values of the block in the photographed image; selecting one of the n regions of photographed images as a reference region; generating look-up tables (LUTs) for non-reference regions, based on the reference region and the input and output color information; and correcting colors of input images to be projected by the image projection device using the look-up tables, thereby minimizing color difference of the input images on the projection surface for both intra and inter projection device color correction while simplifying the correction procedure.
Abstract translation: 提供了一种用于校正图像投影装置的颜色的装置和方法。 该方法包括：通过拍摄投影在投影面上的样本图像来获取拍摄图像; 基于样本图像中的块的颜色值和所拍摄图像中的块的对应颜色值，生成n个区域的输入输出颜色信息; 选择拍摄图像的n个区域中的一个作为参考区域; 基于参考区域和输入和输出颜色信息产生用于非参考区域的查找表（LUT）; 并且通过使用查找表来校正由图像投影设备投影的输入图像的颜色，从而使简化校正过程的同时投影设备颜色校正的投影面上的输入图像的色差最小化。
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公开(公告)号：US10075635B2
公开(公告)日：2018-09-11
申请号：US14994430
申请日：2016-01-13
Inventor： Joo Myoung Seok , Sang Woo Ahn , Yong Ju Cho , Ji Hun Cha
CPC classification number: H04N5/23238 , G06T3/4038
Abstract: Disclosed are a method and an apparatus for generating a panoramic image based on an image quality. The method of generating a panoramic image includes extracting a matching point to connect a base image captured by a first camera and a reference image captured by a second camera, geometrically transforming the reference image by determining a homography between the base image and the reference image, determining a change in image quality of the geometrically transformed reference image, and generating a panoramic image in which the geometrically transformed reference image is connected to the base image based on the determined change in image quality.
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9.发明授权公开(公告)号：US09842273B2
公开(公告)日：2017-12-12
申请号：US15064800
申请日：2016-03-09
Inventor： Yong Ju Cho , Unsang Park , Joo Myoung Seok , Sang Woo Ahn , Ji Hun Cha
IPC: G06K9/46
CPC classification number: G06K9/4671
Abstract: Provided is an apparatus and method for detecting a key point using a high-order Laplacian of Gaussian (LoG) kernel. The high-order LoG kernel is generated based on an LoG operator which is calculated by sequentially differentiating an LoG operator with respect to x and y of an image. A scale space is generated based on the high-order LoG kernel and the key point is detected by comparing a current pixel in the scale space to pixels adjacent to the current pixel.
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10.发明授权Geometric correction apparatus and method based on recursive bezier patch sub-division cross-reference to related application 有权基于递归贝塞尔贴片子分割的几何校正装置和方法相关参考相关应用公开(公告)号：US09197887B2
公开(公告)日：2015-11-24
申请号：US13678315
申请日：2012-11-15
Applicant: Electronics and Telecommunications Research Institute , National University of Sciences & Technology
Inventor： Yong Ju Cho , Ji Hun Cha , Myung Seok Ki , Seong Yong Lim , Yong Ju Lee , Seung Kwon Beack , Jin Woong Kim , Rehan Hafiz , Muhammad Murtaza Khan , Atif Ahmed , Arshad Ali
CPC classification number: H04N17/04 , H04N9/3185 , H04N9/3194
Abstract: Provided is a geometric correction apparatus and method based on a recursive Bezier patch sub-division. A geometric correction method may include: receiving, from a camera, a first image that is obtained by photographing a black screen that is projected by a projector onto a projection surface; receiving, from the camera, a second image that is obtained by photographing a predetermined pattern that is projected by the projector onto the projection screen; generating a third image by subtracting the first image from the second image; and performing geometric correction with respect to the predetermined pattern to correct a distortion between the predetermined pattern and the third image.
Abstract translation: 提供了一种基于递归贝塞尔补丁子分割的几何校正装置和方法。 几何校正方法可以包括：从相机接收通过将由投影仪投影的黑屏拍摄到投影面上而获得的第一图像; 从照相机接收通过将由投影仪投影的预定图案拍摄到投影屏幕上而获得的第二图像; 通过从第二图像中减去第一图像来产生第三图像; 以及对所述预定图案执行几何校正，以校正所述预定图案与所述第三图像之间的失真。
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