公开(公告)号：US11720790B2

公开(公告)日：2023-08-08

申请号：US16879885

申请日：2020-05-21

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE ,  INFORMATION TECHNOLOGY UNIVERSITY (ITU)

Inventor： Yong Ju Cho ,  Jeong Il Seo ,  Rehan Hafiz ,  Mohsen Ali ,  Muhammad Faisal ,  Aman Irshad

IPC: G06N3/08 ,  G06F18/22 ,  G06F18/23 ,  G06V10/82 ,  G06F17/16 ,  G06V10/764 ,  G06V10/77 ,  G06V10/774

CPC classification number: G06N3/08 ,  G06F17/16 ,  G06F18/22 ,  G06F18/23 ,  G06V10/764 ,  G06V10/774 ,  G06V10/7715 ,  G06V10/82

Abstract: Disclosed herein is an image deep learning model training method. The method includes sampling a twin negative comprising a first negative sample and a second negative sample by selecting the first negative sample with a highest similarity out of an anchor sample and a positive sample constituting a matching pair in each class and by selecting the second negative sample with a highest similarity to the first negative sample, and training the samples to minimize a loss of a loss function in each class by utilizing the anchor sample, the positive sample, the first and second negative samples for each class. The first negative sample is selected in a different class from a class comprising the matching pair, and the second negative sample is selected in a different class from classes comprising the matching pair and the first negative sample.

公开(公告)号：US09870601B2

公开(公告)日：2018-01-16

申请号：US15089993

申请日：2016-04-04

Applicant: Electronics and Telecommunications Research Institute ,  National University of Sciences & Technology

Inventor： Yong Ju Cho ,  Joo Myoung Seok ,  Sang Woo Ahn ,  Ji Hun Cha ,  Arshad Ali ,  Muhammad Murtaza ,  Rehan Hafiz ,  Ashar Rasul ,  Saleh Saeed ,  Muhammad Umer Kakli

IPC: G06K9/32 ,  G06T3/40 ,  G06T7/33 ,  G06T7/38

CPC classification number: G06T3/4038 ,  G06T7/33 ,  G06T7/38 ,  G06T2207/10016

Abstract: An apparatus and a method for displaying a panoramic image using a look-up table (LUT) are disclosed, including generating an LUT may include determining first geometric correction information to transform an input domain pixel coordinate system of an input image to a panorama domain pixel coordinate system of a panoramic image, determining second geometric correction information to transform an output domain pixel coordinate system of an output image of the panoramic image to the panorama domain pixel coordinate system of the panoramic image, determining third geometric correction information to transform the output domain pixel coordinate system of the output image to the input domain pixel coordinate system of the input image based on the first geometric correction information and second geometric correction information, and generating an LUT that maps the output domain pixel coordinate system of the output image to the input domain pixel coordinate system of the input image.

公开(公告)号：US09628528B2

公开(公告)日：2017-04-18

申请号：US14333892

申请日：2014-07-17

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Seong Yong Lim ,  Joo Myoung Seok ,  Sang Woo Ahn ,  Yong Ju Cho ,  Ji Hun Cha

IPC: H04L29/06

CPC classification number: H04L65/4084 ,  H04L65/4092 ,  H04L65/601 ,  H04L65/608

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.

公开(公告)号：US09185288B2

公开(公告)日：2015-11-10

申请号：US13800119

申请日：2013-03-13

Applicant: Electronics and Telecommunications Research Institute

Inventor： Myung Seok Ki ,  Yong Ju Cho ,  Seong Yong Lim ,  Ji hun Cha ,  Seung Kwon Beack ,  Yong Ju Lee ,  Jin Woong Kim ,  Seong Dae Kim ,  Wook Joong Kim ,  Ji Sung Yoo ,  Sung Soo Hwang

IPC: H04N5/232 ,  H04N13/00

CPC classification number: H04N5/23238 ,  H04N13/106 ,  H04N13/161

Abstract: An apparatus and method for generating and consuming a three-dimensional (3D) data format to generate a realistic panoramic image are provided. The apparatus may include an image preprocessing unit to search for a matching point between images captured by a plurality of cameras, and to extract, as image information, at least one of a depth value, a texture value and object division information from each of the captured images, an image information structuring unit to structure 3D data to use the extracted image information to generate a realistic image, a 3D data format storage unit to store format information of the structured 3D data in a database (DB), realistic image generating unit to generate a realistic panoramic image using the stored format information of the 3D data, and a realistic image rendering unit to perform rendering on the generated realistic panoramic image.

Abstract translation: 提供了一种用于产生和消耗三维（3D）数据格式以产生逼真全景图像的装置和方法。 该装置可以包括图像预处理单元，用于搜索由多个相机拍摄的图像之间的匹配点，并且从图像信息中提取深度值，纹理值和对象分割信息中的至少一个， 拍摄图像，用于构造3D数据以使用所提取的图像信息以生成逼真图像的图像信息构造单元; 3D数据格式存储单元，用于将结构化3D数据的格式信息存储在数据库（DB）中，逼真图像生成单元 使用存储的3D数据的格式信息生成逼真的全景图像，以及逼真的图像渲染单元，对所生成的逼真全景图像执行渲染。

公开(公告)号：US20150095727A1

公开(公告)日：2015-04-02

申请号：US14391071

申请日：2013-06-11

Applicant: Electronics and telecommunications Research Institute

Inventor： Yong Ju Cho ,  Ji Hun Cha

IPC: H04L1/00 ,  G06F11/07

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。

公开(公告)号：US10075635B2

公开(公告)日：2018-09-11

申请号：US14994430

申请日：2016-01-13

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Joo Myoung Seok ,  Sang Woo Ahn ,  Yong Ju Cho ,  Ji Hun Cha

IPC: H04N5/00 ,  G06T3/40 ,  H04N5/232

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.

公开(公告)号：US09842273B2

公开(公告)日：2017-12-12

申请号：US15064800

申请日：2016-03-09

Applicant: Electronics and Telecommunications Research Institute

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.

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

IPC: H04N9/31 ,  H04N17/04

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。