Pointer type instrument reading automatic identification method

A technology of meter reading and automatic identification, applied in character and pattern recognition, instruments, computer parts, etc., can solve problems such as heavy workload and cumbersome database, and achieve the effect of simple establishment, improved reliability, and reduced information volume.

Inactive Publication Date: 2017-05-31
YICHANG POWER SUPPLY CO OF STATE GRID HUBEI ELECTRIC POWER CO LTD +2
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Problems solved by technology

The database established in the early stage of this method is cumbersome and the workload is very heavy

Method used

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  • Pointer type instrument reading automatic identification method
  • Pointer type instrument reading automatic identification method
  • Pointer type instrument reading automatic identification method

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Embodiment Construction

[0036] The present invention proposes a method for automatic identification of pointer instrument readings, which will be further described below in conjunction with the accompanying drawings and specific implementation methods.

[0037] The present invention proposes a method for automatic identification of pointer instrument readings, the flow chart of which is as follows figure 1 shown, including the following steps:

[0038] Step 1: Collect and calibrate the instrument template diagram for each instrument. The instrument template diagram is a front perspective view of the instrument. The instrument template diagram, the maximum and minimum ranges of the instrument, the unit, and the instrument reading in the instrument template diagram, saved in the template library;

[0039] Step 2: Find the maximum and minimum range scale lines and the pointer line of the instrument in the template diagram, determine the center position of the dial, and save the angle of the maximum and...

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Abstract

The invention provides a pointer type instrument reading automatic identification method, and belongs to the field of digital image processing. The method comprises the following steps of collecting and calibrating an instrument template, and storing a template drawing, maximum and minimum ranges and units of an instrument in the template drawing, and a current position reading of a pointer of the template instrument in a template library; searching for maximum and minimum scale lines and a pointer straight line of the instrument in the template drawing, and storing an angle of the maximum and minimum scale lines and a circle center position of the instrument in the template library; performing template matching, and correcting a to-be-identified instrument drawing to a positive view angle drawing; and searching for a pointer straight line in the to-be-identified instrument drawing by adopting a pointer search method, and calculating an instrument reading. According to the method, the template calibration method is adopted, the establishment of the template library in the early stage is simple, only the angle of the maximum and minimum scale lines needs to be searched for once, the circle center position is determined and stored in the template library, and only the angle of the pointer of each to-be-identified instrument needs to be identified in the later stage, so that the information amount of computer identification is reduced and the reliability is high.

Description

technical field [0001] The invention belongs to the field of digital image processing, in particular to an automatic identification method for pointer instrument readings. Background technique [0002] Pointer instruments are widely used in electric power, petroleum and other industries. Traditional manual reading is inefficient, heavy workload, affected by human subjective factors, and in some environments, it is difficult to perform manual reading due to factors such as the height of the installation location. Applying image processing technology to the automatic recognition of instrument readings can improve efficiency, reduce the workload of personnel, and ensure personal safety. [0003] The existing automatic recognition method of pointer instrument reading based on image processing technology mainly involves the search of scale lines, pointer search, scale number recognition, and circle center positioning. Due to the influence of light, dirt on the dial and other fac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/62
CPCG06V10/757
Inventor 朱涛曾小平陈林程生标胡为民苏伟周云海杨璐高安亮
Owner YICHANG POWER SUPPLY CO OF STATE GRID HUBEI ELECTRIC POWER CO LTD
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