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Character recognition method and system for image in any rotation direction

A text recognition and arbitrary rotation technology, applied in the field of image recognition, can solve the problems of low recognition rate and recognition failure, and achieve the effect of high recognition accuracy.

Active Publication Date: 2021-04-23
SHANDONG ZHONGFU INFORMATION IND +3
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Problems solved by technology

[0004]The commonly used image-to-text conversion process mainly includes image input, preprocessing, tilt correction, character cutting, character recognition and layout recovery; as far as the inventor knows, this traditional The recognition method needs to compare the text with the standard font library, but for the image with rotation angle, the extracted text also has the rotation angle, and the rotation text at any angle is prone to recognition failure and low recognition rate.

Method used

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  • Character recognition method and system for image in any rotation direction
  • Character recognition method and system for image in any rotation direction

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0032] It should be noted that the following detailed description is exemplary and intended to provide further explanation of the present invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0033] It should be noted that the terminology used here is only for describing specific embodiments, and is not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations thereof.

[0034] A ...

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Abstract

The invention provides a character recognition method and system for an image in any rotation direction, and the method comprises the steps: carrying out the sampling of segmented character blocks with fixed sizes in a polar coordinate mode; carrying out normalization and Haar transformation on the sampling data; comparing the Haar converted result with the result of the standard library, if the comparison result meets the requirement, indicating that the matching is successful, and outputting matched characters; according to the invention, the recognition accuracy of the characters in the picture can be improved.

Description

technical field [0001] The invention belongs to the technical field of image recognition, and in particular relates to a character recognition method and system for images in arbitrary rotation directions. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] For the text in the graphics, in most cases, it needs to be converted into the text in the computer for editing. Therefore, the text in the image must be converted into editable text by software. [0004] The commonly used image-to-text conversion process mainly includes image input, preprocessing, tilt correction, character cutting, character recognition and layout restoration; as far as the inventor knows, this traditional recognition method ultimately needs to compare the text with the standard font, but for existing The extracted text of an image with a rotation angle also has a rotati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/20G06K9/34G06K9/46G06K9/62
Inventor 苗功勋曾鸣李栋牛相勇李德笃魏兰磊鲁法利尹湘鲁张敏
Owner SHANDONG ZHONGFU INFORMATION IND
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