Water meter reading video identification technology

Abstract

The invention relates to a water meter reading video recognition method which comprises a water meter and a camera, the diameter of the outer frame circle of a water meter head is preset according to the model of a recognized water meter, the camera is fixed above the water meter, and a water meter reading video is shot in real time. Firstly, the position and the center of a water meter outer frame circle are searched through a Hough circle detection method according to the known outer frame circle diameter; secondly, finding out the positions of all reading circles and the position of the center of a circle in the outer frame circle through a Hough circle detection method, and then determining the to-be-read circle according to the known position of the to-be-read circle; then identifying the circle center of the circle to be read and the position of the fingertip of the pointer in the circle to be read through an angular point detection method, and determining the actual count of the circle to be read according to the rotating angle of a vector formed by the circle center and the fingertip of the pointer; and finally obtaining the running number of the water meter through the actual count conversion of the read circle.

Description

technical field [0001] The invention relates to the field of water meter reading recognition, in particular to a water meter reading video recognition technology. Background technique [0002] Water meter verification is an essential technology for metering technical institutions and water meter manufacturers to produce and test water meters. In order to improve the user experience, the reading of the water meter needs to be reset to zero before leaving the factory. The specific operation method is: manually confirm the reading of the water meter, determine the corresponding number of running numbers, and then reset the reading of the water meter to zero through actual running of water. The problem is that the entire system needs to reset a large number of water meters at the same time. The change of flow rate caused by water pressure makes it impossible to accurately determine the actual number of water meters through time. When the reading of the water meter reaches the ze...

AI Technical Summary

Problems solved by technology

However, since the numbers of all water meter readings are not on the same line, there will be up and down deviations, and after the water meter is filled with water, the sight inside the meter will become dark, which greatly improves the accuracy of image recognition OCR, equipment hardware Costs and software costs have also increased significantly

At the same time, due to the influence of floating bubbles that may appear in the watch, even if high-precision image recognition is used, accurate numbers cannot be obtained, and the reliability is greatly reduced. As a result, manual secondary verification can only be used to determine the final zeroing effect, affecting the verification efficiency of the water meter