公开(公告)号：US20230215100A1

公开(公告)日：2023-07-06

申请号：US18084352

申请日：2022-12-19

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Man Hee LEE ,  Chang Joon PARK

IPC: G06T19/00 ,  G06F18/22

CPC classification number: G06T19/00 ,  G06F18/22 ,  G06T2210/56

Abstract: A device that executes a program stored in the memory to perform generating a local graph for the 3D point cloud based on distances and angles between 3D points in the 3D point cloud; matching the local graph using a similarity function and determining a feature matching pair in a matched local graph; and estimating a rigid body transformation matrix using the feature matching pair is provided.

公开(公告)号：US20190164351A1

公开(公告)日：2019-05-30

申请号：US16057664

申请日：2018-08-07

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Hye Sun KIM ,  Kyung Kyu KANG ,  Chang Joon PARK ,  Yun Ji BAN ,  Dong Wan RYOO ,  Jung Jae YU ,  Man Hee LEE ,  Chang Woo CHU

IPC: G06T19/20 ,  G06T17/20 ,  G06T15/04

CPC classification number: G06T19/20 ,  G06T15/04 ,  G06T17/205 ,  G06T2200/08 ,  G06T2219/2012

Abstract: Disclosed is a method of reconstructing a three-dimensional color mesh and an apparatus for the same. According to an embodiment of the present disclosure, the method includes: receiving mesh information of an object, multiple multi-view images obtained by photographing the object at different positions, and camera parameter information corresponding to the multiple multi-view images; constructing a texture map with respect to the object on the basis of the received information and setting a texture patch referring to a color value of the same multi-view image; correcting a color value of a vertex included for each texture patch; and performing rendering with respect to the object by applying the corrected color value of the vertex to the texture map.

公开(公告)号：US20240212263A1

公开(公告)日：2024-06-27

申请号：US18340575

申请日：2023-06-23

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Man Hee LEE ,  Chang Joon PARK

IPC: G06T15/20 ,  G06T7/60 ,  G06V10/44 ,  G06V10/74

CPC classification number: G06T15/205 ,  G06T7/60 ,  G06V10/44 ,  G06V10/761

Abstract: Provided is a method of selecting a two dimension (2D) image for three dimension (3D) reconstruction, the method including: receiving, by an image processing apparatus, 2D images captured at different positions or in different directions; estimating, by the image processing apparatus, a geometric structure of a camera based on feature points detected from the 2D images, and optimizing the geometric structure of the camera using a bundle adjustment (BA) technique; determining, by the image processing apparatus, a priority for each of the 2D images based on a number of tie points used in the BA process; and selecting, by the image processing apparatus, final 2D images to be used for 3D reconstruction based on the priorities of the 2D images.

公开(公告)号：US20190180422A1

公开(公告)日：2019-06-13

申请号：US16209577

申请日：2018-12-04

Applicant: Electronics and Telecommunications Research Institute

Inventor： Chang Woo CHU ,  Kyung Kyu KANG ,  Hye Sun KIM ,  Chang Joon PARK ,  Yun Ji BAN ,  Dong Wan RYOO ,  Jung Jae YU ,  Man Hee LEE

IPC: G06T5/00 ,  G06T7/73 ,  G06T5/50 ,  H04N5/247

Abstract: Disclosed is a method of performing geometric correction on images obtained by multiple cameras and an image obtainment apparatus therefor, the method including: receiving the images obtained by the multiple cameras; extracting feature points of the received images and checking an interrelation between the extracted feature points; estimating locations and directions of the cameras, which respectively obtain the images, by using the interrelation between the feature points; calculating a relative geometric relationship between the multiple cameras from the estimated locations and directions of the cameras when the received images are determined as the images obtained by the multiple cameras with a fixed geometric interrelationship; and performing the geometric correction on each of the images by using the calculated geometric relationship. The method of efficiently performing geometric correction according to the embodiment of the present invention enables images to be obtained easily using the unmanned device with a short photographing time.

公开(公告)号：US20170256100A1

公开(公告)日：2017-09-07

申请号：US15236697

申请日：2016-08-15

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Ji Hyung LEE ,  Jae Woo KIM ,  Man Hee LEE ,  Kyung Kyu KANG ,  Chang Joon PARK

IPC: G06T19/20 ,  G06F17/50 ,  G06T17/10

CPC classification number: G06T19/20 ,  G06F17/5004 ,  G06F2217/02 ,  G06T17/10 ,  G06T2210/04 ,  G06T2219/2004

Abstract: An apparatus and method for editing three-dimensional (3D) building data. The apparatus for editing the 3D building data includes an input unit configured to obtain 3D scan data of a building, and a processor configured to divide the obtained 3D scan data of the building in units of construction components.