US 2021/0341330 A1 · SYSTEM FOR AUTOMATICALLY MEASURING DISCHARGE IN REAL-TIME BASED ON CCTV IMAGE AND METHOD THEREOF

Abstract

Disclosed is a system for automatically measuring a discharge in real time based on a CCTV image. The system includes: a water depth measurement device filtering water depth data measured by a measurement means with a local linear regression-based bivariate scatterplot smoothing technique through flexible bandwidth application to calculate the water depth of a stream; an image acquisition device acquiring a continuous image of a flow speed measurement side of the stream; an image analysis PC using an image of the image acquisition device to measure the surface flow speed in real time and receiving a measured water depth from the water depth measurement device to measure the discharge in real time with cross-section data; and a discharge calculation and management server for transmitting and displaying a real-time discharge measurement result based on a web.

Claims23

Dependent claims

A closed-circuit television (CCTV) image based real-time automatic discharge measurement system, the system comprising:

a water depth measurement device configured to filter water depth data measured by a measurement unit using a local linear regression-based bivariate scatterplot smoothing technique through adaptive bandwidth application to calculate a water depth of a stream;
an image acquisition device configured to acquire consecutive images of a flow velocity measurement site of the stream;
an image analysis personal computer (PC) configured to measure a surface flow velocity in real time using the images of the image acquisition device and receive the measured water depth from the water depth measurement device to measure a discharge in real time with cross-section data;
and
a discharge calculation and management server configured to transmit and display a real-time discharge measurement result based on the Web.

2 more elements

A closed-circuit television (CCTV) image based real-time automatic discharge measurement method, the method comprising:

an operation of acquiring consecutive images of a flow velocity measurement site of a stream;
an image conversion analyzing operation of dynamically extracting frames of the consecutive images, image-converting the extracted frames, and performing homography calculation in order to normalize the acquired image data;
an operation of extracting an analysis region of an analysis point and calculating a pixel flow velocity through the extracted image in the analysis region of the analysis point;
an operation of converting the calculated pixel flow velocity into an actual flow velocity and calculating a discharge using the actual flow velocity;
and
an operation of receiving water depth information calculated by a positioning filtering process, storing the water depth information in a database through a Web page of a Web server, and providing the corresponding discharge and water depth information through the Web page of the Web server.

3 more elements

Dependencies are inferred from the claim text.

System for automatically measuring discharge in real-time based on cctv image and method thereof

Life of this patent

System for automatically measuring discharge in real-time based on cctv image and method thereof

Life of this patent

Abstract

Claims23