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Text recognition method and device

A text recognition and text technology, applied in the field of image processing, can solve problems such as image blurring, character sticking, and inaccurate text recognition results, and achieve the effect of reducing image blurring and sticking and improving accuracy

Active Publication Date: 2019-10-11
HANGZHOU HIKVISION DIGITAL TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the interpolation algorithm will blur the image and cause stickiness between characters, which brings certain difficulties to subsequent feature extraction and decoding recognition, making the text recognition results inaccurate

Method used

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  • Text recognition method and device

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Embodiment Construction

[0084] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0085] At present, when performing text recognition on low-resolution text images, the interpolation algorithm is mainly used for upsampling, the low-resolution text images are enlarged to the required size, high-resolution text images are obtained, and feature extraction is performed on high-resolution text images. Then, the features are decoded and recognized to obtain text information. However, the interpolation algorithm will blur the image and cause the characters to stick toge...

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Abstract

Embodiments of the invention provide a text recognition method and device. The method comprises the steps of obtaining a to-be-recognized text image; extracting features of the to-be-recognized text image as initial features; converting the initial features into target features according to a preset algorithm; wherein the resolution corresponding to the target feature is higher than the resolutioncorresponding to the initial feature; constructing a target text image according to the target feature and a preset super-resolution model; wherein the preset super-resolution model is obtained by training a first type of text images and a second type of text images corresponding to the first type of text images and is used for constructing a model of the text images corresponding to the input features; wherein the resolution of the second type of text images is higher than that of the first type of text images; determining text features of the target text image; and decoding and identifyingthe text features to obtain text information. By applying the embodiment of the invention, the problems of image fuzzification and adhesion are reduced, and the accuracy of a text recognition result is improved.

Description

technical field [0001] The present application relates to the technical field of image processing, in particular to a text recognition method and device. Background technique [0002] With the development of image processing technology, the application range of text recognition technology is getting wider and wider. For example, text recognition technology can be used as a means of information collection and entry, as an important means of understanding image information, etc. [0003] Too low resolution is often encountered when doing text recognition on text images. For example, the size of the text image is too small, and the number of features extracted by the designed text recognition algorithm is not enough; the deep learning network for text recognition requires the input of the same image size, and the text information is concentrated in the text image whose size is lower than the required size; the text image The size is small, resulting in insufficient discrimina...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/62G06T3/40G06N3/04
CPCG06T3/4053G06V30/10G06N3/045G06F18/213
Inventor 王杰
Owner HANGZHOU HIKVISION DIGITAL TECH