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Correction method for angle-inclined telegraph pole signboard

A technology of angle tilt and signage, which is applied in the field of image recognition technology, can solve the problems affecting the speed and accuracy of signboard character recognition, the angle tilt of utility pole signboards, etc., to reduce the impact of noise, enhance flexibility, The effect of speed and accuracy guarantee

Pending Publication Date: 2020-10-16
BEIJING UNIV OF TECH
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Problems solved by technology

[0003] However, after investigation, it was found that the current data collection of utility pole signboards mainly relies on manual on-site collection. Due to the influence of environment, equipment and other factors, the angle of utility pole signboards in the image will be tilted, which will seriously affect the subsequent signboards. Speed ​​and accuracy of character recognition

Method used

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  • Correction method for angle-inclined telegraph pole signboard
  • Correction method for angle-inclined telegraph pole signboard
  • Correction method for angle-inclined telegraph pole signboard

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Embodiment Construction

[0012] In order to achieve the above goals, the technical solution adopted in the present invention is a method for correcting angle-oriented electric pole identification plates, which is divided into four steps:

[0013] (1) Separation of the target area: Extract the image of the electric pole signboard taken in the natural scene, such as figure 1 As shown, according to the principle of weighted average, the color image is processed to grayscale, and the image noise is removed by nonlinear image smoothing technology to obtain a grayscale image, such as figure 2 shown; according to the different characteristics of the brightness distribution in different areas of the signboard, from image 3 Determine the threshold in the grayscale histogram. The method is as follows:

[0014]

[0015] Among them, i represents the pixel point, r i Represents the gray level of the pixel, n i Represents a grayscale r i The number of pixels, MN is the total number of pixels in the image,...

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Abstract

The invention discloses a correction method for an angle-inclined telegraph pole signboard, and belongs to the field of image recognition technology application. According to the method, an image processing technology is used for carrying out preliminary selection on a suspected target area, and the suspected area is separated from other areas through different thresholds; according to the characteristics of the telegraph pole signboard, noise reduction processing is carried out on all suspected areas to screen out the most suspicious area contour; a minimum enclosing rectangle of the area contour is searched, coordinates and rotation angles of four vertexes are extracted, and vertex coordinates of the inclined signboard are solved by utilizing the coordinates of the rectangle according toa geometrical similarity relation; and finally, inclination correction of the telegraph pole signboard is realized through correlation matrix transformation. The method has very high robustness, canquickly and accurately correct the inclined telegraph pole signboard, and improves the recognition speed and accuracy of the telegraph pole signboard.

Description

technical field [0001] The invention belongs to the application field of image recognition technology, and in particular relates to a method for correcting an electric pole identification plate facing an angle inclination. Background technique [0002] As the country's primary basic industry, electric power plays an important role in the development of the national economy. In recent years, with the rapid development of smart grids, the country's power scale has continued to expand, and the types and quantities of transmission lines have also increased. As the only sign to record the basic parameter information of the transmission line, the utility pole identification plate plays an important role in circuit statistics, management, and inspection. Therefore, using modern technology to efficiently and accurately identify utility pole signs has important practical application value for the automation development of smart grids. [0003] However, after investigation, it was f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/32
CPCG06V30/1478
Inventor 林绍福李汶洁魏倩文
Owner BEIJING UNIV OF TECH
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