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Machine vision-based pointer type meter reading recognition method and device

A technology of instrument reading and machine vision, applied in character and pattern recognition, instruments, computer parts, etc., can solve the problems of not being able to meet the actual needs and not having universality, so as to improve the accuracy and versatility, and solve the problem of not being universal problem, the effect of eliminating recognition errors

Active Publication Date: 2017-04-26
GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] To sum up, the existing machine vision-based pointer instrument reading recognition methods are not universal and cannot meet the actual needs

Method used

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  • Machine vision-based pointer type meter reading recognition method and device
  • Machine vision-based pointer type meter reading recognition method and device
  • Machine vision-based pointer type meter reading recognition method and device

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Embodiment Construction

[0030] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention. As used herein, the term "or / and" includes any and all combinations of one or more of ...

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Abstract

The invention provides a machine vision-based pointer type meter reading recognition method and device. According to the method and device, the complete dial plate image of a pointer type meter to be recognized is acquired; the pointer straight line equation of straight lines where a pointer is located is established; segmentation is performed, so that n sub-images are obtained; the n sub-images are matched with a feature database, so that m matching sub-images are determined; the center pixel coordinates of the m matching sub-images are determined; when m is not 0, an indication number corresponding to a sub-image corresponding the enter pixel coordinate of a corresponding straight line closest to the pointer straight line equation is determined as an indication number closest to the position of the pointer according to the m center pixel coordinates; the pixel coordinates of a point to be verified are determined and are converted into actual spatial coordinates; an image acquisition device is controlled to move to the actual spatial coordinates to acquire the final dial plate image of the pointer type meter to be recognized; and the reading of the pointer type meter to be recognized is obtained through using a distance method according to the final dial plate image.

Description

technical field [0001] The invention relates to the technical field of pointer meter reading recognition, in particular to a machine vision-based pointer meter reading recognition method and device. Background technique [0002] As the most widely used instrument besides the digital instrument, the pointer instrument is widely used in the power industry, petroleum system, automotive electronics and other fields due to its intuitive reading and low price. During the use of pointer instruments, it is inevitable that they will be affected by some internal and external factors, which will cause large indication errors on the instruments and bring greater risks to the measurement industry. Therefore, regular verification and calibration of pointer instruments is very important. However, the current detection and calibration of pointer instruments still rely on traditional manual detection methods, and manual detection has problems such as large measurement errors and low work ef...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/34G06K9/62
CPCG06V10/267G06V2201/02G06F18/2411
Inventor 黄青丹裴利强陈于晴吕慧媛李聃李助亚练穆森赵永平张永强李永强
Owner GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD
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