The Application Of Video Image In The Reservoir Water Level Monitoring

With the development of image processing technology,video surveillance technology is widely used in all kinds of environmental monitoring.Water level data,as an important parameter for the operation of water conservancy projects,is the direct basis for water resources allocation and operation of water conservancy projects.Therefore,water level monitoring is of great significance for the safe operation of water conservancy projects.Water level monitoring is usually realized by visual observation or professional sensors.With the popularity of video surveillance technology,the auxiliary monitoring of water level with image processing technology has good application value.In this paper,a set of automatic monitoring system for reservoir water level based on image processing technology is designed.The image capture gauge in the video stream,the use of image recognition technology,automatic calculation of water level.This method only needs to install a color or CCD camera in the "visible" draft place,continuous shooting process at the level gauge.The background software periodically intercepts a frame from the video stream according to the professional needs.The image by edge detection,gray stretch,binarization processing,stripping out the draft contains only scales and numbers "".The "draft" then the scale line of the digital divide,on the line after denoising,obtained with only one pixel wide horizontal line,and then use the eight connectivity analysis method can calculate the line number.The digital region is segmented and the next row number is extracted.Then the row number is processed by character segmentation,normalization and feature extraction.Then it is sent to BP neural network for digit recognition.According to the application of different water level changes,the water level value can be calculated by the combination of calibration line identification and digital identification.The water level video image acquisition and camera device based on the draft in addition,mainly by software,has high accuracy,simple equipment,convenient maintenance,low construction costs,The practical application can be used as an effective supplement to sensor water level meter,which can be widely used in water level measurement.