Curly text image preprocessing method and lottery ticket scanning recognition method

A text image and recognition method technology, which is applied in the field of image processing, can solve the problems of unrecognizable documents, difficult to correct curly text image recognition text information, etc., and achieve the effect of improving recognition accuracy and reducing false recognition rate

Inactive Publication Date: 2014-12-24
SHENZHEN YIXUNTIANKONG INTERNET TECH CO LTD
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AI Technical Summary

Problems solved by technology

[0006] In order to solve the technical problem that the existing text image preprocessing technology is difficult to correct the curly text image and then identify its text information, the present invention provides a curly text image preprocessing method
[0007] In order to solve the technical problem that the prior art text image information identification technology cannot identify lottery tickets, the present invention provides a lottery scanning identification method based on the above-mentioned curly text image preprocessing method

Method used

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  • Curly text image preprocessing method and lottery ticket scanning recognition method
  • Curly text image preprocessing method and lottery ticket scanning recognition method
  • Curly text image preprocessing method and lottery ticket scanning recognition method

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Embodiment

[0031] In this embodiment, the curly text image preprocessing is to convert the captured text image into an image that can be recognized by the OCR recognition engine unit, and the process includes the following steps:

[0032] A. Scale the text image. Since the current camera pixels are relatively high, the processing speed can be increased by reducing the pixels by scaling the image; the scaled text image can be grayscaled to increase the processing speed.

[0033] B. Stretch the text image in grayscale and enhance the edge effect.

[0034] C. Binarize the text image after grayscale stretching to improve processing speed and facilitate subsequent edge extraction.

[0035] D. Perform edge extraction on the binarized text image. Find the edge of the text image through the connected area method, first-order derivation or second-order derivation; for example, Robert operator, sobel operator, prewitt operator, kirsch operator, laplacian operator, canny operator, Log (laplacian ...

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Abstract

The invention relates to a curly text image preprocessing method and a lottery ticket scanning recognition method. The curly text image preprocessing method comprises the steps of carrying out gray stretch on a text image and enhancing the edge effect, carrying out binaryzation on the text image after gray stretch, carrying out edge extraction on the text image after binaryzation, carrying out image rotation and correction on the text image according to extracted edge, and straightening and correcting the curly edge. The lottery ticket scanning recognition method is based on the curly text image preprocessing method, and comprises the steps that curly text image preprocessing is carried out on a lottery ticket after the lottery ticket is scanned, then character information on the preprocessed and scanned lottery ticket is recognized through the OCR engine recognition technology, and further whether a prize is won in a lottery is determined. The curly text image preprocessing method and the lottery ticket scanning recognition method improve the recognition accuracy rate of lottery ticket class curly text images and have reference significance for recognition of the curly text images under similar unsatisfactory conditions.

Description

technical field [0001] The present invention relates to image processing technology, in particular to a curly text image preprocessing method, and a lottery ticket scanning recognition method based on the aforementioned curly text image preprocessing method. Background technique [0002] With the development of the mobile Internet and the popularization of smart phones, the hardware of the mobile phone is becoming more and more powerful, making it possible to directly take photos and preview graphics and images of text information carriers (such as printed paper, brochures, lottery tickets, business cards, etc.) through mobile phones. Processing and OCR recognition of text on the carrier becomes possible. [0003] At present, the technology of taking pictures of the text information carrier to form a text image, and then recognizing the text on the text image has been more and more widely used; for example, scanning a business card with a mobile phone to identify and extract...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06K9/20
Inventor 陈时龙田昭赋
Owner SHENZHEN YIXUNTIANKONG INTERNET TECH CO LTD
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