Template matching method for character recognizing and processing

A template matching and text recognition technology, applied in character recognition, character and pattern recognition, instruments, etc., can solve the problems of easy matching deviation, scale variability, sensitivity to illumination variability, etc., to improve character recognition rate and solve wrinkles Effect

Inactive Publication Date: 2016-08-31
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

However, template matching also has its defects, that is, it is sensitive to the scale variability and illumination variability of the same type of characters in different scene images, and it is easy to cause matching deviation.

Method used

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  • Template matching method for character recognizing and processing
  • Template matching method for character recognizing and processing
  • Template matching method for character recognizing and processing

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Embodiment Construction

[0017] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments and accompanying drawings.

[0018] The template matching method of the present invention is used for character recognition processing, and its specific implementation steps are as follows:

[0019] S1: Image preprocessing process:

[0020] S1-1: Input the image to be recognized. The image to be recognized may be collected by an online camera device, or may be a saved scene image. In this embodiment, the collected image samples are captured by a camera, and the image samples come from 13 different types of paper medical test sheets. For the same test sheet of the same category, different angles, distances and lighting will be selected when taking pictures to enrich the test sample library of the images to be recognized.

[0021] S1-2: Image inclination correction: firstl...

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Abstract

The present invention discloses a template matching method for character recognizing and processing, belonging to the technical field of pattern recognition and image processing. The method comprises the following steps: preprocessing the characteristics extraction of an inputted template and a to-be-recognized image; performing rectangle frame calibration by using adjacent communicable regions in the image and word region as units, and obtaining a plurality of characteristic rectangles; and then performing multiple times of normalizations of coordinate origins and scales of the current template image and the image to be recognized; calculating the similarity of the characteristic set for each normalization; and taking the largest similarity of characteristic set as the matching similarity of the current template image; and finally obtaining the template with the maximum matching similarity of all the template images that is taken as the best matching template of the current image to be recognized. The character recognizing module of the invention is used for character recognizing and processing, especially for a medical examination sheet recognition system, which can overcome the influences of factors such as scene image wrinkling, scale change and light change on character recognition, thus improving the character recognition rate.

Description

technical field [0001] The invention belongs to the technical field of pattern recognition and image processing, and in particular relates to a template matching technology in character recognition technology. Background technique [0002] With the advancement of information technology, especially the rapid development of artificial intelligence technology, OCR (Optical Character Recognition) technology has achieved many achievements in the field of information recognition, and has also entered the practical stage of socialization. OCR technology has been successfully applied to all walks of life. In various industries, it is also widely used in the medical industry. [0003] From the point of view of statistical pattern recognition, character recognition is actually a problem of pattern classification. Scholars at home and abroad have proposed many different recognition schemes, which can be roughly divided into classifier-based recognition methods and template matching-ba...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/62G06K9/32G06K9/36G06K9/40G06K9/20
CPCG06V10/22G06V10/243G06V10/20G06V10/30G06V30/10G06F18/22G06F18/24
Inventor 梅亚敏于鸿洋张平曾创
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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