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A Latin character tilt correction method and system based on rotation projection width

A technology of Latin characters and rotating projection, which is applied in the field of image recognition and verification, can solve the problem of low character recognition rate in verification code pictures, and achieve the effects of improving recognition rate, reducing costs and improving work efficiency

Active Publication Date: 2019-01-15
SHENZHEN BEYEBE NETWORK TECH CO LTD
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method and system for correcting the inclination of Latin characters based on the width of the rotation projection, aiming at solving the problem of low character recognition rate in verification code pictures

Method used

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  • A Latin character tilt correction method and system based on rotation projection width
  • A Latin character tilt correction method and system based on rotation projection width

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Embodiment Construction

[0035] figure 1 It shows the flow chart of the Latin character tilt correction method based on the rotation projection width provided by the present invention, which is described in detail as follows:

[0036] Step S1, use the collector of the system to capture the verification code picture of the webpage information, and remove the capture interference patterns other than the Latin character information on the captured picture, so as to facilitate subsequent corresponding processing.

[0037] Step S2, performing binarization processing on the picture subjected to the interference pattern processing; the color image of the picture is converted into a black and white image through binarization processing. Binarization includes two parts, A. Graphics are converted to black and white. Generally, a discriminant function is used to receive a color value and return a true / false Boolean result. They represent black (character) and white (background) respectively. Because of different...

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Abstract

The present invention relates to a method for rectifying the inclination of Latin characters based on the rotation projection width, comprising: A, a collector captures a picture of a verification code and performs pattern interference processing on the captured picture; Value processing; C. Project the binarized picture along the vertical direction to calculate the number of black points on each pixel width; D. Cut the image into individual characters according to the position of the minimum value of the valley on the projected image; E 1. Rotate the cut single character multiple times in clockwise and counterclockwise directions by 0.1 radian each; F. Use the function to calculate the width of the rotated graphic; G. Select the rotation angle with the smallest width to the original picture The characters are angle rotated and the preprocessed image is output. By cutting the characters in the picture and recognizing the characters, the character recognition rate of the picture is improved, the work efficiency of recognizing images is improved, and the work cost is reduced.

Description

technical field [0001] The invention belongs to the field of image recognition and verification, and in particular relates to a method and system for correcting the inclination of Latin characters based on the rotation projection width. Background technique [0002] Because the license plate number is neat and tidy, the reason for the inclination is the angle of the photo, so all the characters have the same inclination angle, and the character height (Height) and position height (Y coordinate) of each character in the license plate number are exactly the same, Therefore, Hough transform and simple projection analysis work well in license plate number recognition. There are also some methods for document OCR such as Fourier and kNN methods, which are based on the same inclination and rotation angles of all characters in the document, (this is in the license plate and scanned documents are established) this assumption. [0003] Applied to the verification code recognition me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/32G06K9/54
CPCG06V30/1478G06V30/153
Inventor 杜卫红谢立欧蒋立成
Owner SHENZHEN BEYEBE NETWORK TECH CO LTD
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