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Image Recognition Method of Pointer Meter Based on Contour Fitting and Radial Segmentation

An image recognition and pointer-type technology, which is applied in image analysis, image enhancement, image data processing, etc., can solve the problems of weak self-adaptive ability, pointer detection interference, and many parameters to be adjusted, and achieve strong adaptability and good scalability , the effect of accurate identification

Active Publication Date: 2021-05-28
WUHAN UNIV OF SCI & TECH
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Problems solved by technology

However, this method needs to adjust too many parameters, the adaptive ability is weak, and it is not easy to expand and use
The subtraction method is to use the gray value subtraction of the original image and the template image to obtain an image containing only the pointer of the instrument. When the illumination changes greatly, the gray value of the background other than the pointer will also change, and the detection result will be different. Other background information appears, which interferes with pointer detection

Method used

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  • Image Recognition Method of Pointer Meter Based on Contour Fitting and Radial Segmentation
  • Image Recognition Method of Pointer Meter Based on Contour Fitting and Radial Segmentation
  • Image Recognition Method of Pointer Meter Based on Contour Fitting and Radial Segmentation

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Embodiment Construction

[0045] The following will be combined with Figure 1-10 To illustrate the best implementation mode of the present invention, the pointer instrument image recognition method based on contour fitting and radial segmentation algorithm implemented according to the present invention is as follows, but is not limited to the following examples.

[0046] Such as figure 1 Shown is the flow chart of the pointer instrument image recognition method based on contour fitting and radial segmentation algorithm of the present invention, and this flow chart is applicable to all pointer instruments. In the implementation process, (1) first extract the contour information of the pointer instrument image, (2) then separate the closed contour into edge contour curves, (3) then remove the bulge on the edge contour curve; (4) remove the edge contour (5) Then merge the edge contour curves with similar characteristics, and then use the least squares method to perform circle fitting on the merged edge ...

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Abstract

The invention relates to a pointer instrument image recognition method based on contour fitting and radial segmentation. Firstly, the closed contour curve of the pointer instrument image is extracted; then the closed contour is separated into edge contour curves by the contour separation method; then the edge contour is denoised, and the fitting circle of the instrument panel is obtained by using the least square method circle fitting; then using The region growing algorithm extracts the set of pixel points where the pointer of the meter is located; finally, the pointer of the meter is positioned. The invention can overcome the interference of factors such as shadows on the meter, digital symbols, wide pointers, etc., can detect meter images of different sizes and positions, and has strong self-adaptive adjustment ability.

Description

technical field [0001] The invention relates to a pointer instrument image recognition method based on contour fitting and radial segmentation, which belongs to the field of computer image processing. Background technique [0002] As a measuring instrument, the pointer instrument is widely used in large industrial fields due to its simple structure, convenient maintenance and use, high reliability, low price, waterproof, antifreeze, dustproof, etc., such as power systems, petroleum Chemical industry, factories and mines, railway system and other industries. Common pointer instruments are: voltmeter, barometer, oil temperature gauge, thermometer, water meter, etc. Due to the reasons in the workplace, these pointer instruments generally have no data interface, and cannot realize the automatic collection and transmission of measurement parameters. Therefore, the reading of this pointer instrument mainly depends on the manual method, that is, to observe the scale value pointed...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/13G06T7/62G06T7/70G06T7/10G06T5/00
CPCG06T7/10G06T7/13G06T7/62G06T7/70G06T5/70
Inventor 吴怀宇吴杰张思伦陈镜宇喻汉蔡丽仪
Owner WUHAN UNIV OF SCI & TECH
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