Abstract
With the development of science and technology, inspection robots have attracted more and more attention, and research on the automatic reading of pointer instruments through inspection robots has become particularly valuable. Aiming at the problems of uneven illumination, complex dial background and damping fluid interference of the collected instrument images, this paper proposes a dial gauge reading algorithm based on coordinate positioning. First, the multi-scale retinex with color restoration (MSRCR) is applied to improve the uneven illumination of the image. Second, a circle detection algorithm based on the arc-support line segment is proposed to detect the disc to obtain the coordinate of the center and radius of the circle. Then, a pointerless template is used to obtain the pointer, and the concentric circle algorithm is applied to locate the refined pointer. Finally, the automatic reading is calculated using the relative position of the pointer and the zero scale. The experimental results prove that the proposed algorithm can accurately locate the center of the circle and the pointer and obtain readings automatically.
Highlights
With the rapid development of the national economy, the demand for electricity in modern society is increasing
The theoretical underpinning of the multi-scale retinex with color restoration (MSRCR) algorithm is that the color of the object is not brightness [18]
The results show that the contrast of the image processed using the MSRCR algorithm significantly improved while reducing the influence of different brightverify the speed accuracy of theeffect circle center detection ness levels.To
Summary
With the rapid development of the national economy, the demand for electricity in modern society is increasing. Algorithms based on deep learning have a high accuracy in detecting instruments, but they require a lot of time to train in the early 3stage. This method is not universally applicable to workplaces such as substations that require real-time detection and real-time warning. Pointer instrument detection is mainly divided into the poses an automatic reading algorithm for dial gauges based on coordinate positioning. The automatic reading algorithm based on coordinate positioning comWhen these steps, it coordinate will be affected by theThis light,mainly the complicated background prises performing two parts. (4) The automatic reading: The indicating value is calculated according to the relative
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