WO-2026095149-A1 - METHOD AND DEVICE FOR GENERATING, THROUGH CAPTURED IMAGES, MEASUREMENT LINE INFORMATION FOR MEASURING FLOW RATE ACCORDING TO CHANGES IN WATER LEVEL OF RIVER, AND COMPUTER-READABLE RECORDING MEDIUM

WO2026095149A1WO 2026095149 A1WO2026095149 A1WO 2026095149A1WO-2026095149-A1

Abstract

The present invention relates to a method for generating, through captured images, measurement line information for measuring a flow rate according to changes in the water level of a river, the method being implemented by a computing device that includes one or more processors and one or more memories for storing instructions executable by the processors, and comprising: a process initiation step of, when image information obtained by capturing an offline river is received from a camera device provided near the river, initiating a measurement line calculation process of calculating a measurement line for measuring the flow rate of the river through the image coordinates of the river in an image based on the image information; a real world coordinate calculation step of, when the measurement line calculation process is initiated, analyzing the image information through a pre-stored image analysis algorithm so as to identify the image coordinates of the river in the image based on the image information, and then reflecting the identified image coordinates in a preset real world coordinate calculation equation so as to calculate the real world coordinates of the offline river; and a measurement line information provision step of, when the calculation of the real-world coordinates is completed, reflecting the calculated real-world coordinates in a preset water surface width calculation equation so as to calculate the water surface width of the offline river, identifying the number of measurement lines for the river through a pre-stored measurement line derivation table, then analyzing the image information through the pre-stored image analysis algorithm so as to calculate intervals between the measurement lines based on the center of the river on the basis of the image coordinates of the river in the image based on the image information, generating measurement line information including the number of measurement lines and the intervals between the measurement lines, and transmitting the measurement line information to a manager. Various other embodiments identified by the present document are possible.

Inventors

HUH, Jaeseong

Assignees

니브스코리아 주식회사

Dates

Publication Date: 20260507
Application Date: 20241111
Priority Date: 20241031

Claims (10)

A method for generating survey line information for measuring flow rate according to changes in river water level through captured images implemented by a computing device comprising one or more processors and one or more memories storing instructions executable by said processors, A process start step for initiating a survey line calculation process that, upon receiving image information of a river captured by a camera device installed near the river, calculates a survey line for measuring the flow rate of an offline river through image coordinates of the river within the image based on said image information; When the above survey line calculation process starts, a real-world coordinate calculation step that analyzes the image information through a previously stored image analysis algorithm to identify image coordinates of a river within the image based on the image information, and then reflects the identified image coordinates in a pre-set real-world coordinate calculation formula to calculate the real-world coordinates of a river located offline; and A method for generating survey line information for measuring flow rate according to water level changes in a river through captured images, characterized by including: a step of providing survey line information, wherein, when the calculation of the above-mentioned real-world coordinates is completed, the above-mentioned real-world coordinates are reflected in a pre-set water surface width calculation formula to calculate the water surface width of a river located offline, and the number of survey lines for the river is identified through a pre-stored survey line derivation table, and the above-mentioned image information is analyzed through the above-mentioned image analysis algorithm, and the spacing between survey lines based on the center of the river is calculated based on the image coordinates of the river within the image based on the image information, and survey line information including the number of survey lines and the spacing between survey lines is generated and transmitted to an administrator.
In paragraph 1, The above process start step is, When receiving image information of a river captured from the above camera device, an input variable identification step for identifying multiple input variable information stored in a database; A specification value input request step in which, once the identification of the plurality of input variable information is completed, the plurality of input variable information is provided to an administrator, and the administrator is requested to input a specification value to each of the plurality of input variable information to be used for calculating a survey line for the offline river; and A method for generating survey line information for measuring flow rate according to changes in river water level through captured images, characterized by including: a survey line calculation process start step, which starts the survey line calculation process when actual measurement specification information, in which specification values are entered for each of the plurality of input variable information, is received from an administrator by performing the function of the above-mentioned specification value input request step.
In paragraph 1, The above multiple input variable information is, A method for generating survey line information for measuring flow rate according to changes in river water level through captured images, characterized by comprising a form in which specification values are input for each of the following: the X coordinate where the camera device is located in offline coordinates, the Y coordinate where the camera device is located in offline coordinates, the Z coordinate where the camera device is located in offline coordinates, the height from the water level gauge located offline to the camera device, the height from the river bottom located offline to the water level gauge, the water level of the river located offline, the front-back angle of the camera device located offline, the left-right angle of the camera device located offline, the product of the focal length and magnification for the x and y directions of the camera device located offline, and the center point of the image based on the captured video taken by the camera device located offline.
In paragraph 3, The above real-world coordinate calculation step is, When the above survey line calculation process starts, a search target coordinate setting step is performed by analyzing the image information through a previously stored image analysis algorithm to set search target coordinates, which are image coordinates corresponding to the area of the river within the image based on the image information; A normalized coordinate transformation step in which, once the setting of the search target coordinates is completed, the search target coordinates are reflected in a pre-set normalized coordinate transformation formula to transform the image coordinates into normalized coordinates (x, y) for calculating the real-world coordinates; and A method for generating survey line information for measuring flow rate according to changes in river water level through captured images, characterized by including: a real-world coordinate calculation completion step in which, once the image coordinates are converted into the normalized coordinates, the normalized coordinates are reflected in a preset real-world coordinate calculation formula to calculate real-world coordinates corresponding to the area of a river located offline.
In paragraph 4, The above-mentioned pre-set real-world coordinate calculation formula is, As a first real-world coordinate formula for calculating the real-world X coordinate, ; and As a second real-world coordinate formula for calculating the real-world Y coordinate, A method for generating survey line information for measuring flow rate according to changes in river water level through captured images characterized by including ;
In paragraph 1, The above step of providing survey line information is, A water surface width calculation step in which, when the calculation of real-world coordinates corresponding to the area of an offline river is completed, the real-world coordinates for the area of an offline river corresponding to the search target coordinates, which are image coordinates corresponding to the area of the river within an image based on the image information, are reflected in a pre-set water surface width calculation formula to calculate the water surface width of the offline river; and A method for generating survey line information for measuring flow rate according to water level changes in a river through captured images, characterized by including: a step of identifying the number of survey lines, wherein, when the calculation of the above-mentioned water surface width is completed, the water surface width range among the plurality of water surface width ranges reflected in the previously stored survey line derivation table is identified to include the calculated water surface width range, and the number of survey lines matching the identified water surface width range is identified as the number of survey lines for a river located offline.
In paragraph 1, The above step of providing survey line information is, A step of setting center reference coordinates, wherein, once the identification of the number of survey lines for a river located offline is completed, the search target coordinates, which are image coordinates corresponding to the area of the river, are reflected in a pre-set formula for calculating the center point coordinates of the water flow, to calculate the center point coordinates of the river's water flow start and end, and to set center reference coordinates, which are image coordinates based on the center of the river within the image; and A method for generating survey line information for measuring flow rate according to changes in water level of a river through captured images, characterized by including a survey line spacing calculation step, which calculates the spacing between survey lines based on the coordinates of the starting point and the ending point of the water flow of the river within the image through the number of survey lines when the function of the above-mentioned center reference coordinate setting step is completed.
In Paragraph 7, The above step of providing survey line information is, A method for generating survey line information for measuring flow rate according to changes in river water level through captured images, characterized by generating and providing to an administrator survey line information that reflects the number of survey lines, the coordinates of the water flow start point and the water flow end point, which reflect the spacing between survey lines based on the center reference survey line based on the center reference coordinates, when the function of the above-mentioned survey line spacing calculation step is completed.
A device for generating survey line information for measuring flow rate according to changes in river water level through captured images, implemented as a computing device comprising one or more processors and one or more memories for storing instructions executable by said processors, A process starter that, upon receiving image information of a river captured by a camera device installed near the river, initiates a survey line calculation process for calculating a survey line for measuring the flow rate of an offline river through image coordinates of the river within the image based on the image information; When the above survey line calculation process starts, a real-world coordinate calculation unit analyzes the image information through a previously stored image analysis algorithm to identify image coordinates of a river within the image based on the image information, and then reflects the identified image coordinates in a pre-set real-world coordinate calculation formula to calculate the real-world coordinates of a river located offline; and A device for generating survey line information for measuring flow rate according to water level changes in a river through captured images, characterized by including: a survey line information providing unit that, when the calculation of the above real-world coordinates is completed, reflects the calculated real-world coordinates in a preset water surface width calculation formula to calculate the water surface width of a river located offline, identifies the number of survey lines for the river through a preset survey line derivation table, analyzes the above image information through the above preset image analysis algorithm, calculates the spacing between survey lines based on the center of the river based on the image coordinates of the river within the image based on the image information, generates survey line information including the number of survey lines and the spacing between survey lines, and transmits it to an administrator.
As a computer-readable recording medium, The above computer-readable recording medium stores instructions that cause a computing device to perform the following steps, said steps being: A process start step for initiating a survey line calculation process that, upon receiving image information of a river captured by a camera device installed near the river, calculates a survey line for measuring the flow rate of an offline river through image coordinates of the river within the image based on said image information; When the above survey line calculation process starts, a real-world coordinate calculation step that analyzes the image information through a previously stored image analysis algorithm to identify image coordinates of a river within the image based on the image information, and then reflects the identified image coordinates in a pre-set real-world coordinate calculation formula to calculate the real-world coordinates of a river located offline; and A computer-readable recording medium characterized by comprising: a step of providing survey line information, wherein, when the calculation of the above real-world coordinates is completed, the calculated real-world coordinates are reflected in a pre-set water surface width calculation formula to calculate the water surface width of a river located offline, and the number of survey lines for the river is identified through a pre-stored survey line derivation table, and the above image information is analyzed through the above-stored image analysis algorithm, and the spacing between survey lines based on the center of the river is calculated based on the image coordinates of the river within the image based on the image information, and survey line information including the number of survey lines and the spacing between survey lines is generated and transmitted to an administrator.

Description

Method, apparatus, and computer-readable recording medium for generating survey line information for measuring flow rate according to changes in river water level through captured video. The present invention relates to a method for generating survey line information for measuring flow rate according to changes in water level of a river through captured images. Specifically, the invention relates to a technology that analyzes image information captured by a camera device installed near the river to identify image coordinates of the river within the image, calculates real-world coordinates of the river located offline, calculates the width of the river's water surface by reflecting the real-world coordinates in a pre-set formula for calculating the width of the water surface, identifies the number of survey lines for the river using the width of the water surface, calculates the spacing between survey lines based on the center of the river using the identified number of survey lines and image coordinates, generates survey line information including the number of survey lines and the spacing between survey lines, and provides this information to an administrator. Hydrological data is essential for river and water resource management, and among these, flow rate data is considered the most important. In particular, due to recent climate change, droughts and floods are occurring more frequently, and changes in river environments caused by specific projects necessitate more flow rate data than in the past for proper river and water resource management. Consequently, the production and provision of accurate data are required. Currently, flow rate surveys are conducted using two methods: the traditional method, in which humans directly measure flow using a velocity meter at points where river flow is not controlled by structures or affected by tidal drainage (for the purpose of developing level-discharge relationship curves), and the method of installing velocity measuring equipment directly in the river to measure flow rate in real time. However, since the aforementioned methods have limitations in conducting accurate surveys due to climatic and surrounding conditions, the industry is developing various technologies to measure river flow rates more quickly and accurately. As an example, Korean registered patent 10-2712831 (river flow rate measurement system) discloses a technology for measuring the flow rate of a river by measuring the cross-section of the river cross-section instead of a distance measuring sensor. However, the aforementioned prior art discloses only a technology that simply measures the cross-section of a river and measures the flow rate of the river cross-section through a flow velocity measurement sensor. It does not disclose a technology that analyzes image information captured by a camera device installed near the river to identify the image coordinates of the river within the image, calculates the real-world coordinates of the river located offline, calculates the width of the river's surface located offline by reflecting the real-world coordinates in a pre-set formula for calculating the width of the water surface, identifies the number of survey lines for the river using the width of the water surface, calculates the spacing between survey lines based on the center of the river using the identified number of survey lines and image coordinates, generates survey line information including the number of survey lines and the spacing between survey lines, and provides this information to an administrator. Consequently, there is a growing need for a technology capable of resolving this issue. FIG. 1 is a flowchart illustrating a method for generating survey line information for measuring flow rate according to changes in water level of a river through captured images according to one embodiment of the present invention. FIG. 2 is a flowchart illustrating the process start step of a method for generating survey line information for measuring flow rate according to changes in water level of a river through captured images according to one embodiment of the present invention. FIG. 3 is a diagram showing the specification values of a method for generating survey line information for measuring flow rate according to changes in the water level of a river through captured images according to one embodiment of the present invention. FIG. 4 is a flowchart illustrating the real-world coordinate calculation step of a method for generating survey line information for measuring flow rate according to changes in river water level through captured images according to an embodiment of the present invention. FIG. 5 is a flowchart illustrating the step of providing survey line information for a method of generating survey line information for measuring flow rate according to changes in water level of a river through captured images according to one embodiment of the present invention. FIG. 6 is another flowchart