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
CN106599897AActive Publication Date: 2017-04-26GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD
Publication Date
2017-04-26

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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.
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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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