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Instrument pointer scale value calculation method

A calculation method and technology of instrument pointers, which can be used in computing, computer parts, instruments, etc., and can solve the problems of time-consuming, labor-intensive, and poor reliability.

Active Publication Date: 2017-10-10
安徽慧视金瞳科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If not detected in time, there may be serious consequences
Manual work is time-consuming, labor-intensive, low in verification efficiency, large in verification errors, and poor in reliability

Method used

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  • Instrument pointer scale value calculation method

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Embodiment Construction

[0074] A method for calculating a scale value of an instrument pointer, comprising the following steps:

[0075] 1), establish a background image: analyze the brightness of all images when the pointer is at each scale, and use the brightness value in the middle of the sorting position as the brightness value of the corresponding pixel position in the background image, and then establish a background image;

[0076] When the pointer is automatically detected, the positions of the meter and the camera are stationary, and the dials, numbers, icons, etc. on the meter are stationary; but during the detection, the pointer is moving; you can use the This feature improves the effect of pointer detection; therefore, before detection, a background image needs to be established for subsequent use of image difference to extract pointers. The specific production process of the background image is as follows:

[0077] 1.1) Change the position of the pointer, and take an image of the pointer...

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Abstract

The invention belongs to the instrument pointer reading technology field and more particularly, to an instrument pointer scale value calculation method, which comprises the following steps: 1) preparing a background image; 2) positioning a current image via a template image; 3) carrying out color training to the pointer pixels; 4) performing current image pointer pixel extraction; 5) analyzing the pointer connection area; 6) performing pointer edge extraction; 7) carrying out pointer edge straight line fitting; 8) performing pointer middle line equation calculation; and 9) carrying out pointer scale value calculation. According to the invention, through the extraction, the connection area analysis, the straight line fitting and the middle line equation calculation of the instrument pointer pixels, it is possible to realize the fast calculation of the pointer scale values on a graduation disc with known scale values. This can achieve high efficiency and accuracy, and overcomes the shortcoming of manual reading. The method greatly promotes the instrument production and detection.

Description

technical field [0001] The invention belongs to the technical field of meter pointer reading, and in particular relates to a method for calculating a scale value of a meter pointer. Background technique [0002] For the inspection of instruments in some industries, especially instruments with relatively high accuracy, the verification personnel are required to analyze the difference between the actual reading of the pointer meter and the output of the standard power supply on each scale that needs to be verified to analyze the instrument to be verified. performance. However, due to the limited resolving power of the human eye, when the pointer is located between the two scale lines, the position of the pointer can only be roughly estimated, and the indication of the meter cannot be accurately read, which will directly affect the accuracy of the test. Furthermore, people's eyes will experience visual fatigue after a lot of visual work, and there will be negligence and errors...

Claims

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Application Information

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IPC IPC(8): G06K9/00G06K9/46G01D7/00
CPCG01D7/00G06V20/10G06V10/443G06V10/56
Inventor 邓宏平汪俊锋戴平栾庆磊
Owner 安徽慧视金瞳科技有限公司
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