A water level detection method and river channel monitoring method based on machine vision

Abstract

The invention discloses a machine vision-based water level detection method and a river channel monitoring method. The water level detection method includes the following steps: first obtain a water gauge with the following structure, including a water gauge body, and a water gauge line is coated on the water gauge body , the water gauge line includes a characteristic color line painted vertically, the two sides of the characteristic color line have scale line blocks arranged alternately along the length direction, and the scale line blocks include three characteristic scale lines arranged at intervals, Both the characteristic scale line and the characteristic color line are painted in red, and a white scale line is painted between two adjacent characteristic scale lines, so that the scale line block and the characteristic color line form an "E" shape; The area between the tick mark blocks on one side is painted with a blue color block, and the area between the tick mark blocks on the other side is painted with numbers. The invention has the advantages of not needing to identify characters of the water gauge.

Description

technical field [0001] The invention relates to the technical field of water level detection, in particular to a machine vision-based water level detection method and a river channel monitoring method. Background technique [0002] Water level is one of the basic hydrological elements of rivers, lakes and reservoirs. Since information such as water supply in cities and irrigation areas, storm and flood flow, runoff sediment and nutrient transfer rates are usually obtained based on water level measurements, continuous and reliable water level monitoring It is of great significance to comprehensively improve the level of early warning and forecasting of flood control and drought relief and the daily supervision of rivers and lakes. The water gauge records the height of the water level through readings, which is the most intuitive and simple measurement tool; however, the traditional water gauge measurement requires manual regular observation, which has a low degree of automati...

AI Technical Summary

Problems solved by technology

[0004] Chinese patent literature discloses a water level recognition method based on a binary coded character water gauge and image processing (public number: CN107367310A), establishes a binary coded character positioning and segmentation model and a binary coded character water scale scale line extraction model, and uses a template matching method Recognize characters, and then convert the water level value. It is difficult to guarantee the accuracy of detection when the image resolution is low and the scale line and characters of the water scale are not clear.

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