公开(公告)号：US09774837B2

公开(公告)日：2017-09-26

申请号：US14688982

申请日：2015-04-16

Applicant: Electronics and Telecommunications Research Institute

Inventor： Ji Ho Chang ,  Dae Hwan Hwang ,  Kwang Ho Yang ,  Eul Gyoon Lim ,  Jae Il Cho

IPC: H04N9/31 ,  G06T7/80 ,  H04N17/00 ,  H04N13/02

CPC classification number: H04N9/3191 ,  G06T7/80 ,  G06T2207/10012 ,  G06T2207/10028 ,  H04N9/3185 ,  H04N13/246 ,  H04N13/254 ,  H04N17/004

Abstract: Disclosed are a system and method for performing distortion correction and calibration using a pattern projected by a projector. The system for performing distortion correction and calibration includes a projector that projects a pattern, at least one camera that generates a photographed pattern image by photographing an image onto which the pattern is projected, and an image processing device that calculates a calibration parameter by comparing an original pattern image projected by the projector and the photographed pattern image. Thus, it is possible to obtain an accurate depth image by easily utilizing an image for the pattern projected by the projector. In addition, when obtaining the depth image, the calibration parameter for correcting image distortion according to camera lens and a calibration state of cameras may be efficiently obtained using the pattern projected by the projector.

公开(公告)号：US09967516B2

公开(公告)日：2018-05-08

申请号：US14811070

申请日：2015-07-28

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Ji Ho Chang ,  Jae Chan Jeong ,  Ho Chul Shin ,  Dae Hwan Hwang ,  Seung Min Choi ,  Eul Gyoon Lim ,  Jae Il Cho ,  Kuk Jin Yoon

IPC: H04N5/911 ,  H04N13/02 ,  G06T7/521 ,  G06T7/593 ,  H04N13/00

CPC classification number: H04N5/911 ,  G06T7/521 ,  G06T7/593 ,  G06T2207/10012 ,  G06T2207/10152 ,  H04N13/239 ,  H04N13/254 ,  H04N2013/0081

Abstract: There are provided a stereo matching method capable of increasing a resolution and precision of an object and a device for performing the method. The method includes investigating a pattern according to a predetermined period; obtaining left and right stereo images in which the investigated pattern is included or not included; determining whether each of the stereo image obtained according to the predetermined period and a buffering image that is a previous frame image of the stereo image includes the pattern; and generating a final cost volume by performing different image processing according to whether each of the stereo image and the buffering image includes the pattern. Therefore, it is possible to increase precision of a disparity of a thin object and increase accuracy and precision of an object at a long distance.

公开(公告)号：US09721348B2

公开(公告)日：2017-08-01

申请号：US14992984

申请日：2016-01-11

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Jae Chan Jeong ,  Ji Ho Chang ,  Seung Min Choi

IPC: G06K9/00 ,  G06T7/00

CPC classification number: G06T7/40 ,  G06K9/6203 ,  G06K2009/6213 ,  G06T7/41 ,  G06T7/44 ,  G06T7/593 ,  G06T2207/10012 ,  G06T2207/20021 ,  G06T2207/20228

Abstract: Disclosed is an apparatus and method for calculating a raw-cost necessary for combining images into one image by matching of stereo images. The raw-cost calculation apparatus includes an image acquirer, a window generator, a window mask generator, a window masker, and a raw-cost calculator. In the raw-cost calculation apparatus and method, a raw cost may be calculated by using an adaptive window mask so that accurate 3D information may be obtained on the boundary of thin structures even when stereo images are matched and combined.

公开(公告)号：US10313650B2

公开(公告)日：2019-06-04

申请号：US15469223

申请日：2017-03-24

Applicant: Electronics and Telecommunications Research Institute

Inventor： Eul Gyoon Lim ,  Ji Ho Chang ,  Jae Chan Jeong

IPC: H04N13/106 ,  H04N13/257 ,  H04N13/246 ,  H04N13/239 ,  H04N13/00

Abstract: An apparatus and method for calculating a cost volume by controlling an intensity so as to receive relatively less influence from a condition of intensity when capturing a stereo image and changing a parameter for each level according to distance is provided. The apparatus includes an illuminator controller, a pixel expected ratio calculator, and a cost volume calculator, and controls intensity using the illuminator when capturing an object, and calculates a cost volume value so as to receive relatively less influence from distance and intensity when performing stereo matching by changing a parameter used for calculating the cost volume value according to distance to the object and intensity.