Title:
APPARATUS AND METHOD FOR MEASURING FLOW VELOCITY OF STREAM BY USING OPTICAL FLOW IMAGE PROCESSING
Document Type and Number:
WIPO Patent Application WO/2020/101103
Kind Code:
A1
Abstract:
The present invention relates to an apparatus and a method for measuring the flow velocity of a stream by using optical flow image processing, the apparatus and the method improving the efficiency and accuracy of flow velocity measurement by calculating a pixel flow velocity from successive images collected with a camera with respect to cross-section information about a site, an analysis time, an analysis interval, and an analysis region and converting the calculated pixel flow velocity into an actual physical flow velocity, and the apparatus comprises: an image capturing unit for acquiring successive images of a stream flow velocity measurement site; an image conversion analysis unit for dynamically extracting frames of the successive images in order to normalize image data of the image capturing unit, performing image conversion on the extracted frames, and performing a homography calculation; an analysis region extraction unit for extracting an analysis region of an analysis point; a pixel flow velocity calculation unit for calculating a pixel flow velocity through images of the analysis region of the analysis point, extracted by the analysis region extraction unit; and an actual flow velocity calculation unit for converting, into an actual flow velocity, the pixel flow velocity calculated by the pixel flow velocity calculation unit.
Inventors:
KIM SEO JUN (KR)
YOON BYUNG MAN (KR)
YOU HO JUN (KR)
KIM DONG SU (KR)
CHEONG TAE SUNG (KR)
JOO JAE SEUNG (KR)
CHOI HYEON SEOK (KR)
YOON BYUNG MAN (KR)
YOU HO JUN (KR)
KIM DONG SU (KR)
CHEONG TAE SUNG (KR)
JOO JAE SEUNG (KR)
CHOI HYEON SEOK (KR)
Application Number:
PCT/KR2018/014983
Publication Date:
May 22, 2020
Filing Date:
November 29, 2018
Export Citation:
Assignee:
HYDROSEM (KR)
REPUBLIC OF KOREA NATIONAL DISASTER MANAGEMENT RES INSTITUTE (KR)
REPUBLIC OF KOREA NATIONAL DISASTER MANAGEMENT RES INSTITUTE (KR)
International Classes:
G01P5/26; G06F17/16; G06T7/66
Foreign References:
| KR100817907B1 | 2008-03-31 | |||
| KR101753360B1 | 2017-07-03 | |||
| KR20160100788A | 2016-08-24 | |||
| JP2008058264A | 2008-03-13 | |||
| KR101741501B1 | 2017-05-30 |
Attorney, Agent or Firm:
OH, Wihwan (KR)
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