A new automatic measurement method for canals water level is proposed based on image processing

aiming at problem of canals water level acquisition.On the basis of achieving self-adaptive extraction scaleplate area through color information

according to features of scaleplate

use improved edge detection algorithm to segment feature images

and access water level information.The water level acquisition experiment confirms that this method is not affected by cameras installing angle

canals water turbidity and temperature

and measured error of water level height can be controlled within 1 cm

it has strong robustness.