Title:
WATER LEVEL MEASUREMENT SYSTEM AND WATER LEVEL MEASUREMENT METHOD
Document Type and Number:
WIPO Patent Application WO/2017/149744
Kind Code:
A1
Abstract:
Provided is a technology for detecting the water level of a river and the like by image processing. After an angle of view setting process, an area setting process unit sets an arbitrarily defined certain range from the center of the set angle of view as a processing area (S21). Then, a flow processing unit 62 calculates, from the processing area, motion information (flow) and a flow direction (S22, S23), computes a flow density, determines a region having a high density and a close flow direction to be a flow of water current, and deletes flows in other directions (S24). Thereafter, a graph-cut processing unit 63 creates an object seed and a background seed for graph-cutting (S25, S26), and detects a water surface by automatic graph-cutting (S27). After an edge extraction processing unit 64 has performed edge extraction (S28), a water level calculation processing unit 65 determines an edge that satisfies a predetermined condition to be a water level line, and outputs a water level measurement result (S29).
More Like This:
Inventors:
AGATA YOSHIKI (JP)
Application Number:
PCT/JP2016/056734
Publication Date:
September 08, 2017
Filing Date:
March 04, 2016
Export Citation:
Assignee:
HITACHI INT ELECTRIC INC (JP)
International Classes:
G01C13/00; G01F23/292; G06T7/20; G06T7/60
Foreign References:
| JP2007256254A | 2007-10-04 | |||
| JPH11122602A | 1999-04-30 |
Other References:
SHUN'ICHI TOKOYODA ET AL.: "Graph Cuts Segmentation Considering Intensity Difference in the Proximal Area", THE INSTITUTE OF IMAGE INFORMATION AND TELEVISION ENGINEERS NENJI TAIKAI KOEN YOKOSHU, 26 August 2009 (2009-08-26), pages 17-1 - 1 - , 17-1 -2, XP055414109
Attorney, Agent or Firm:
HORI, Shiroyuki et al. (JP)
Download PDF: