Water level collecting method based on image identification

Abstract

The invention discloses a water level collecting method based on image identification. The water level collecting method is characterized in that an image identification method is adopted for identifying a water surface in a photograph and a specific reference point in the photograph and combining a center point of the photograph for calculating the water level height of the water surface. The forming of the photograph is an optical imaging process, so that each point in the photograph is corresponding to an object one by one. According to the water level collecting method, a projection relationship of a camera, the photograph and the object is utilized to establish a projection triangle, so that the water level height of the water surface is calculated according to the information, namely, the height of the reference point, the horizontal distance between the reference point and the camera, the height of the camera, and the like. According to the water level collecting method, the level of river water in a river channel is calculated by utilizing one photograph, so that the calculation for the water level of the river channel is more convenient and the construction cost of a gauging station and a hydrometric station can be effectively reduced.

Description

technical field [0001] The invention is applied in the field of river channel water level measurement and calculation, especially the method of image recognition to collect the river channel water level. Background technique [0002] Traditional water level measurement includes float type, static pressure type, bubble pressure type, ultrasonic type, radar type, vibrating wire type, etc. Some of these methods are complicated to install, some are not accurate enough, and some are difficult to adapt to the process of catastrophic floods. Difficult to combine with instruments measuring other hydrological elements to save cost. [0003] The camera water level measurement method disclosed in the present invention uses a camera, and the water level height of the water surface is calculated by using the principle of optical imaging and trigonometric functions. Today, when high-definition cameras emerge in endlessly, the measurement accuracy can reach very high, but the purchase cost...

AI Technical Summary

Problems solved by technology

[0002] Traditional water level measurement includes float type, static pressure type, bubble pressure type, ultrasonic type, radar type, vibrating wire type, etc. Some of these methods are complicated to install, some are not accurate enough to measure, and some are difficult to adapt to the process of catastrophic floods. Difficult to combine with instruments that measure other hydrological elements to save cost

Images