Pointer-type instrument recognition method based on machine vision

A technology of machine vision and recognition method, applied in the field of image recognition, can solve the problems of low precision, low efficiency, poor objectivity of data storage, etc., and achieve the effect of automation, high accuracy and high efficiency

Inactive Publication Date: 2017-08-11
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of low efficiency, low precision and poor objectivity of data preservation in the process of manual reading of p

Method used

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  • Pointer-type instrument recognition method based on machine vision

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Embodiment Construction

[0017] The present invention will be further described below in combination with specific embodiments.

[0018] A method for recognizing a pointer instrument based on machine vision, comprising the following steps

[0019] Step 1, image acquisition

[0020] The robot turns on the camera, collects the image information of the pointer instrument panel in the lens, and uploads the image information as the source image to the PC;

[0021] Step 2, preprocessing the image information to obtain a binarized image

[0022] The linear grayscale transformation function is used to grayscale the image, and then the gradient method is used to sharpen the grayscale image, and the threshold value is obtained by using the OTSU inter-class variance algorithm to segment the image; the invalid information in the image is removed by the erosion dilation method, and the obtained image is obtained. Binarized image; the present invention adopts first corrosion and post-expansion method.

[0023] S...

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Abstract

The invention provides a pointer-type instrument recognition method based on machine vision, comprising: 1) a raw image is collected and uploaded; 2) image information is subjected to preprocessing and a binarized image is obtained; 3) a scale contour is extracted, a scale circle is fitted and expanded, and special point positions are obtained; 4) a pointer is extracted and a pointer contour is obtained; 5) the pointer is thinned; 6) a reference point is determined; 7) a pointer straight line segment is fitted; 8) a reading is read; and 9) a database table of instrument data is designed. The method utilizes the machine vision technology to replace the manual reading of the pointer-type instrument. Through a series of image processing and calculation of the instrument image, the instrument is read more accurately to realize automated instrument reading. The method is high in accuracy, high in efficiency, and widely applicable.

Description

technical field [0001] The invention relates to a method for recognizing a pointer instrument based on machine vision, and belongs to the technical field of image recognition. Background technique [0002] In daily life and production, instrument is a common tool used to display various important parameters. General instruments include two types: pointer and digital. An analog meter uses a pointer and a scale to indicate a value. Digital meters display values ​​directly in numbers. Although the development of digital instrument technology is very fast, the pointer instrument has a simple structure, convenient use and low price, and has occupied a very important position in industrial production for a long time. The reading of existing pointer instruments is basically done manually, which will not only cause waste of labor, but also cause visual fatigue. [0003] Using machine vision technology instead of human eyes to measure and judge pointer instruments can improve the...

Claims

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Application Information

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IPC IPC(8): G06K9/34G06K9/46G06K9/62G06F17/30
CPCG06F16/22G06V10/267G06V10/44G06V2201/02G06F18/23
Inventor 陈颢天王炳森赵炳昊唐达曾岑岳前进冯帆尹超群周佳杨志向李奇蓬
Owner DALIAN UNIV OF TECH
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