Water level monitoring method

Abstract

The invention discloses a water level monitoring method, and solves the technical problems that an existing water level monitoring method is easily affected by lights and the water level monitoring error is large; the method comprises the following steps: gathering mark post and water surface images; using the features that the mark post is small in brightness change and the water surface brightness continuously changes caused by changing ripples, and using an image processing technology to read the gray values of two images with the adjacent taken time; making difference calculations, and drawing a relation graph between difference gray average variance yields and coordinates for the water surface in the image; using a threshold segmentation algorithm to obtain the coordinates corresponding to the gray average variance mutation moment, i.e., the water surface coordinates; combining a statistic method to smoothen the water surface coordinates; finally, calculating the water level depthaccording to the mapping relation between the mark post real lengths and the image coordinates. The method can accurately determine the water level position, can monitor the water depth in real time,and has very well robustness and timeliness.

Description

Technical field [0001] The invention relates to a water level monitoring method, which belongs to the technical field of image processing. Background technique [0002] The traditional water level monitoring method is mainly to set a benchmark with a certain scale in the water. The water surface and benchmark images are obtained by shooting the water surface with a camera. The captured images are observed by human eyes and the current is read according to the scale on the benchmark. To achieve the purpose of monitoring the water level. However, due to natural environmental factors such as light and climate, the resolution of the captured image is affected to a certain extent. Especially in the backlit situation, the human eye can hardly distinguish the water level and the scale line on the benchmark. Therefore, the traditional method is affected by Environmental factors affect the error greatly. [0003] With the rapid development of computer vision and image processing technolog...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art, provide a water level monitoring method, and solve the technical problems in the prior art that the water level monitoring is easily affected by light and the water level monitoring error is large

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