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Automatic number identification method and system of power pointer type instrument

An automatic reading and pointer-type technology, which is applied in the field of image processing, can solve problems such as difficult reading and multiple known information, and achieve the effect of satisfying multiple viewing angles and solving the effect of image shadows

Inactive Publication Date: 2017-03-22
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To solve the problem that the current pointer instrument reading identification method requires more known information, and the reading is difficult to identify under conditions such as uneven illumination and instrument tilt

Method used

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  • Automatic number identification method and system of power pointer type instrument
  • Automatic number identification method and system of power pointer type instrument
  • Automatic number identification method and system of power pointer type instrument

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Embodiment Construction

[0037] The present invention will be further described below in conjunction with the accompanying drawings.

[0038] see figure 1 , a flow chart of a method for automatic reading recognition of an electric pointer meter is proposed for the present invention.

[0039] Such as figure 1 As shown, a method for automatic reading recognition of an electric pointer instrument comprises the following steps:

[0040] Step 101, collecting the image of the instrument panel;

[0041] Step 102, preprocessing the collected instrument panel image to extract the effective recognition area of ​​the instrument panel;

[0042] Step 103, using the pointer and scale line stroke features to extract the pointer and scale line of the instrument from the effective identification area of ​​the instrument dial;

[0043] Step 104, extracting the numbers on the dial, and automatically identifying the readings.

[0044] The present invention collects the instrument panel image, inputs the instrument p...

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PUM

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Abstract

The invention discloses an automatic number identification method of a power pointer type instrument. The method comprises the following steps that an image of an instrument dial is collected; the collected image of the instrument dial is preprocessed, and an effective identification area of the instrument dial is extracted; a pointer and a graduation line of the instrument are extracted from the effective identification area of the instrument dial by utilizing stroke characteristics of the pointer and the graduation line; and numbers of the dial are extracted, and identified automatically. The invention also provides an automatic number identification system of the power pointer type instrument. The system comprises an instrument dial image collection unit, an instrument dial image preprocessing unit, a pointer and graduation line extraction unit and an instrument number identification unit. According to the method and system, shadow influence on the collected instrument dial image under the condition that illumination is complex and changeable can be eliminated effectively, and required number information is obtained; and the instrument dial is read effectively.

Description

technical field [0001] The invention relates to the field of image processing, in particular to a method and system for automatic reading recognition of electric pointer meters. Background technique [0002] In power system substations, many devices are equipped with instruments such as barometers, thermometers, and oil temperature gauges, and most of them are pointer instruments. At present, the instrument data is mainly recorded by human eyes. The detection efficiency is low and the accuracy is not high. Especially for long-term continuous interpretation, it is easy to cause visual fatigue and lead to errors. In addition, there are some occasions where manual interpretation cannot be used. The existing recognition methods of instrument readings mainly include: general digital image processing method and central projection method. However, these methods are all aimed at the interpretation under uniform lighting conditions and at the same level as the instrument, and the e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/20G06K9/46G06K9/40
CPCG06V10/22G06V10/30G06V10/44
Inventor 施伟佘世洲刘辉张东江玉荣汪霄祥叶良明杨伟国吴文兵朱程杰沈瑛俊张骥
Owner STATE GRID CORP OF CHINA
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