Power plant instrument image detection and identification method and device

Abstract

The invention relates to a power plant instrument image detection and recognition method and device, and the method comprises the steps: collecting an original image of a power plant instrument, carrying out the image preprocessing, and extracting an instrument dial region in the original image to form a target image; processing the target image through an improved Canny detection algorithm; carrying out non-maximum suppression on the gradient amplitude; obtaining an upper threshold value and a lower threshold value of the image after non-maximum suppression by adopting a self-adaptive threshold value confirmation algorithm; determining the boundary of the image through a double-threshold algorithm according to the upper threshold and the lower threshold; detecting straight lines and circles in the binary boundary image through a Hough change algorithm; and obtaining the range reading of the instrument according to the straight line and the circle in the binary boundary image through apointer instrument identification method. Compared with the prior art, the instrument image is identified by combining the Canny detection algorithm and the Hough transformation algorithm, and the pointer type power plant instrument is rapidly and accurately identified; meanwhile, the recognition stability is high.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a detection and recognition method and device for a power plant instrument image. Background technique [0002] The traditional manual inspection method of substations has high intensity, long time, high frequency, and many high-risk environments, which are prone to personal injury and unstable inspection quality. At the same time, inspection meter reading has high repeatability and difficult data utilization. [0003] With the rapid development of technologies such as Industry 4.0, intelligent manufacturing, artificial intelligence, and big data, intelligent inspection robots are gradually popularized in substation inspection applications. However, the application of robot technology in power plants has not been developed rapidly. This is because the production of power plants is full of complex environments such as high temperature and high pressure, gas, acid and alka...

AI Technical Summary

Problems solved by technology

However, its disadvantage is that it has low robustness to noise, and there are many problems such as false edges and isolated edge points in the detection image, which affect the subsequent detection accuracy.

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