Method and device for recognizing pointer instrument readings based on machine vision

A technology of instrument reading and machine vision, applied in character and pattern recognition, instruments, computer parts, etc., can solve problems such as lack of versatility and failure to meet actual needs, so as to improve accuracy and versatility, and solve incompatibility problem, the effect of eliminating recognition errors

Active Publication Date: 2019-10-18
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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  • Method and device for recognizing pointer instrument readings based on machine vision
  • Method and device for recognizing pointer instrument readings based on machine vision
  • Method and device for recognizing pointer instrument readings based on machine vision

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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 highly versatile machine vision-based pointer instrument reading recognition method and device. The method and device collect the complete dial image of the pointer instrument to be identified, establish the pointer straight line equation of the straight line where the pointer is located; match the n sub-images obtained by segmentation with the feature database, determine m matching sub-images, and determine m matching sub-images The central pixel coordinates of the image; when m is not 0, according to the m central pixel coordinates, the index number corresponding to the sub-image corresponding to the central pixel coordinates of the line closest to the straight line equation corresponding to the pointer is determined as the one closest to the pointer position Indicate the number; determine the pixel coordinates of the points to be verified, and convert the pixel coordinates of the points to be verified into actual space coordinates; control the image acquisition device to move to the actual space coordinates, and collect the final dial image of the pointer instrument to be identified; according to the final dial image, using the distance method to obtain the reading of the current pointer instrument to be recognized.

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 Patents(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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