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Single-character text normalization model training method and device, and single-character text recognition method and device

A model training, single-character technology, applied in the field of image recognition, can solve problems such as text pictures that are not suitable for recognizing complex styles, and achieve the effect of accelerating training and convergence, and improving recognition accuracy.

Pending Publication Date: 2020-04-03
上海眼控科技股份有限公司
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Problems solved by technology

[0004] Based on this, it is necessary to provide a single-character text normalization model training method, text recognition method and device capable of recognizing complex-style text pictures in view of the above-mentioned problem that the traditional network structure is not suitable for recognizing complex-style text pictures

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  • Single-character text normalization model training method and device, and single-character text recognition method and device

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[0044] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

[0045] Since traditional OCR tasks usually need to recognize character texts that appear in different fonts, sizes or styles under various complex backgrounds, and the traditional BLSTM+CTC-based network structure is complex, it usually extracts features through convolutional layers to obtain input The feature map of the feature map; then the sequence of the feature map at the width position is regarded as a time series, and the character information is extracted through the BLSTM network; finally, the probability of whether each position is the background or a certain char...

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Abstract

The invention relates to a single-character text normalization model training method and device, and a single-character text recognition method and device. The model training method comprises the following steps: acquiring a plurality of single-character sample pictures; normalizing the single-character sample pictures to obtain standard character pictures corresponding to the single-character sample pictures; generating a training data set according to the plurality of single-character sample pictures and standard character pictures in one-to-one correspondence with the plurality of single-character sample pictures; and training a deep learning neural network by using the training data set and a mean square loss function to obtain a single-character text normalization model. The trainingdata set used in training is composed of original data and the standard character pictures which are obtained through normalization processing and have a unified style, so that in the process of training the model, the training and convergence of the model can be accelerated, the model can better learn the essential characteristics of various input texts, and the recognition precision of the modelis further improved.

Description

technical field [0001] The present application relates to the technical field of image recognition, in particular to a single-character text normalization model training method, text recognition method and device. Background technique [0002] With the development of artificial intelligence technology, more and more tedious work is replaced by machines. As an important branch of computer vision, the OCR (Optical Character Recognition) task is widely used in many fields such as bill recognition and automatic text entry. However, usually the original text of this type of task may appear in various complex backgrounds, such as may appear in different styles such as various fonts and sizes. Therefore, it is necessary to use computer vision-related methods to identify the corresponding characters in the text strings located from the pictures for downstream tasks. [0003] As an important branch of artificial intelligence, deep learning has achieved great success in various fiel...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06K9/34G06K9/62G06N3/04
CPCG06V30/40G06V30/153G06N3/044G06N3/045G06F18/214
Inventor 周康明周枫
Owner 上海眼控科技股份有限公司
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