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Vision measurement-based grid circular oil level gauge automatic reading method

A technology of automatic reading and visual measurement, applied in computing, image data processing, instruments, etc., can solve problems such as uneven illumination of images, inability to prepare automatic counting of instruments, occlusion, etc.

Active Publication Date: 2017-06-09
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0005] The present invention provides an automatic reading method for the grid circular oil level gauge based on visual measurement to solve the problem of complex background entering the image due to the imaging process in the prior art, and the uneven illumination of the image. Occlusion and other effects, resulting in the automatic counting of the meter that cannot be prepared

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  • Vision measurement-based grid circular oil level gauge automatic reading method
  • Vision measurement-based grid circular oil level gauge automatic reading method
  • Vision measurement-based grid circular oil level gauge automatic reading method

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[0106] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0107] A method for automatic reading of a grid circular oil level gauge based on vision measurement, characterized in that it comprises the following steps:

[0108] Step 11: Read the initial image f(x,y);

[0109] Step 12: Convert the initial image f(x,y) into a grayscale image f gray (x,y), where the grayscale image f gray The formula for the gray value of each pixel of (x, y) is as follows:

[0110]

[0111] in, Represents a grayscale image f gray (x,y) the gray value of each pixel, R f (x, y) represents the pixel value of each pixel in the red channel of the initial image f(x, y); G ...

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Abstract

The present invention discloses a vision measurement-based grid circular oil level gauge automatic reading method and belongs to the intelligent gauge reading field of machine vision industrial applications. According to the technical scheme of the invention, a maximally stable extremal region (MSER) matching algorithm is adopted to position grids. Meanwhile, the directional-search sharp edge method is adopted to determine a longest grid. Moreover, according to the length of the longest grid, the percentage of the amount of remaining oil can be calculated. The result of the test on multiple images shows that, the above method mainly emphasizes the main feature of the above type of instruments, namely grids, compared with other intelligent meter reading methods, wherein grids are still good in significance under the interference of image rotation, image blurring and the like. Therefore, the method of the invention is good in robustness.

Description

technical field [0001] The invention discloses an automatic reading method of a grid circular oil level gauge based on vision measurement, which is used for accurately reading the grid circular oil level gauge and belongs to the field of machine vision. Background technique [0002] The automatic reading technology of industrial instruments mainly uses pattern recognition to extract specific instruments, ranges and reading positions to achieve the purpose of reading. Compared with manual reading, its advantages are: 24-hour uninterrupted reading, labor saving, high stability and high efficiency. Therefore, in the application of the industrial field, the reading of smart meters has a high research value. [0003] Measuring the performance of the automatic reading algorithm of industrial instruments is mainly reflected in the ability of instrument positioning, reading extraction and image restoration and correction. At present, there are many kinds of old-fashioned instrumen...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/12G06T7/13G06T7/136
Inventor 彭真明谢吉航黄建平王者风杨沐林刘勇余娟曹思颖李美惠何艳敏蒲恬
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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