Republic of Korea (national Disaster Management Research Institute)

Hydrosem

Hyeon Seok Choi

Dong Su Kim

Jae Seung Joo

Byung Man Yoon

Tae Sung Cheong

Seo Jun Kim

Ho Jun You

Disclosed is a device and a method for measuring stream water depth in real-time through positioning data filtering to ensure the reliability of the measured water depth data even when the stream water depth measurement data is filtered and applied to a small stream having a small basin area and a steep slope. The device for measuring stream water depth in real-time through positioning data filtering includes: a measuring part for measuring the water depth of a stream to be measured; a positioning data filtering part for filtering the water depth data measured by the measuring means by a local linear regression-based bivariate scatterplot smoothing technique through elastic bandwidth application; and a water depth calculating part for calculating a water depth of the stream to be measured by using the positioning data filtered by the positioning data filtering part, and minimizing the uncertainty of the water depth measurement.

Device and method for measuring stream water depth in real-time through positioning data filtering

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.

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

Disclosed is a river flow velocity measurement device using optical flow image processing, including: an image photographing unit configured to acquire consecutive images of a flow velocity measurement site of a river; an image conversion analysis unit configured to dynamically extract frames of the consecutive images in order to normalize image data of the image photographing unit, image-convert the extracted frames, and perform homography calculation; an analysis region extracting unit configured to extract an analysis region of an analysis point; a pixel flow velocity calculating unit configured to calculate a pixel flow velocity using an image in the analysis region of the analysis point extracted by the analysis region extracting unit; and an actual flow velocity calculating unit configured to convert the pixel flow velocity calculated by the pixel flow velocity calculating unit into an actual flow velocity.

Apparatus and method for measuring flow velocity of stream using optical flow image processing

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Ulsan, South Korea

Hyeon Seok Choi