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Indicator content identification method, device and apparatus

A content recognition and signage technology, applied in character recognition, character and pattern recognition, instruments, etc., can solve the problems affecting the application of navigation information, blurred signs, abnormal reflections, etc., to ensure navigation accuracy and improve recognition accuracy. degree of effect

Active Publication Date: 2020-07-14
ALIBABA GRP HLDG LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, since the signs are all set in the open air, they are easily disturbed by the external environment, such as being blocked by foreign objects such as leaves and bird droppings, abnormal reflections caused by changes in light, and corrosion and damage caused by wind and sun for many years, etc., will cause signs become blurred, so it is difficult to ensure the accuracy of the recognized content when using the existing technology to identify the content of the sign
If the content of the identified signs is wrong, it will affect the accuracy of the produced electronic map, which will affect the application of navigation information

Method used

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  • Indicator content identification method, device and apparatus
  • Indicator content identification method, device and apparatus
  • Indicator content identification method, device and apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] This embodiment provides a method for identifying sign content, such as figure 1 As shown, the method may include the following steps:

[0035] Step 100, identifying text and graphic symbols in the picture of the sign.

[0036] Wherein, the picture of the sign can be obtained by shooting the sign, for example, it can be taken by a camera on the vehicle, or it can be taken by a vehicle recorder. The sign picture may include various character elements such as text and graphic symbols, and multiple texts form text lines, and different text lines are distributed at different positions of the graphic symbols.

[0037] E.g, figure 2 The signage picture shown includes the following character elements:

[0038] Road name text lines in Chinese: "Guanghua Road", "Shiyang Road", "Junnong Road", "Youyihe Road" and "Ninghang Expressway", etc.;

[0039] Road name text lines in pinyin: "GUANGHUALU", "SHIYANGLU", "JUNNONGLU" and "NINGHANGGAOSU" etc.;

[0040] Distance text line: ...

Embodiment 2

[0081] This embodiment provides a device for identifying sign content, which can be installed in a local server or a cloud server. Recognition is carried out, and the recognized results are added to the electronic map data for users to use.

[0082] Such as Figure 5 As shown, the sign content recognition device may include: a graphic recognition module 10 , a character recognition module 20 , a block division module 30 , a text determination module 40 , a direction determination module 50 , a road name matching module 60 and a content determination module 70 . It works as follows:

[0083] The graphic recognition module 10 recognizes graphic symbols in the picture of the sign; the character recognition module 20 recognizes the text in the picture of the sign. Specifically, the text area of ​​each text can be determined using optical detection technology, and the text in each text area can be identified using a neural network analysis model.

[0084] The block dividing modu...

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Abstract

The invention discloses an indication board content identification method, device and apparatus. The method comprises: identifying characters and graphic symbols in an indication board picture, performing block division on the sign board picture, determining the characters in the same block as a text line, determining a driving direction corresponding to the text line according to the relative position of the text line and the graphic symbol, performing road name matching on the text line and map data corresponding to the driving direction, and determining the content of the indication board according to the matching result of the road name matching and the graphic symbol. According to the invention, the driving direction is determined according to the relative position relationship between the text lines and the graphic symbols during sign identification, and road name matching is performed on the text line based on the map data corresponding to the driving direction, so that the problem that the indication board content cannot be identified due to blurring of the indication board is solved, the identification accuracy of the indication board content can be improved, and the navigation precision is ensured.

Description

technical field [0001] The invention relates to the fields of machine vision and artificial intelligence, in particular to a method, device and equipment for content recognition of signage. Background technique [0002] Signposts refer to road sign signs set on both sides of the road to indicate road information ahead. With the rapid development of navigation technology, as an important part of electronic map data, the content of signage with direction information is becoming more and more important. Therefore, it is necessary to obtain the content information of signage in the process of making electronic map data. In the prior art, when identifying the content of the sign, the sign is usually photographed on the spot, and then the text recognition is performed on the photographed picture of the sign to obtain the content of the sign. [0003] However, since the signs are all set in the open air, they are easily disturbed by the external environment, such as being blocked ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/32G06K9/34
CPCG06V20/63G06V30/153G06V30/10
Inventor 赵锟
Owner ALIBABA GRP HLDG LTD
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