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Apparatus and method for obtaining character truth value of document image, and electronic device

A document image and acquisition device technology, applied in the field of communication, can solve problems such as low efficiency, error-prone, high labor costs, etc., and achieve the effect of wide application range and high accuracy

Active Publication Date: 2020-09-08
FUJITSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional method based on manual annotation is not only inefficient and error-prone, but also brings great labor costs

Method used

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  • Apparatus and method for obtaining character truth value of document image, and electronic device
  • Apparatus and method for obtaining character truth value of document image, and electronic device
  • Apparatus and method for obtaining character truth value of document image, and electronic device

Examples

Experimental program
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Effect test

Embodiment 1

[0024] An embodiment of the present invention provides a device for acquiring the true value of a character in a document image, figure 2 It is a schematic diagram of the device for acquiring the true value of characters of a document image according to Embodiment 1 of the present invention. Such as figure 2 As shown, the device 200 includes:

[0025] Transformation unit 201, which is used to transform the document image according to the current transformation matrix between the document image and the standard image;

[0026] A matching unit 202, configured to partially match the image block in the transformed document image with the image block in the standard image, and obtain a matching image block in the transformed document image that matches the image block in the standard image , so as to obtain the corresponding image block in the document image corresponding to the matching image block;

[0027] a calculation unit 203, which is used to calculate the matching erro...

Embodiment 2

[0064] The embodiment of the present invention also provides an electronic device, Figure 4 is a schematic diagram of an electronic device according to Embodiment 2 of the present invention. Such as Figure 4 As shown, the electronic device 400 includes a document image character truth acquisition device 401. The structure and function of the document image character truth value acquisition device 401 are the same as those described in Embodiment 1, and will not be repeated here.

[0065] In this embodiment, the electronic device may include a camera, a video camera, a tablet computer, a smart watch, smart glasses, a media player, a game device, a computer, and the like. The embodiment of the present invention does not limit the type of electronic equipment.

[0066] Figure 5 is a schematic block diagram of the system configuration of the electronic device according to Embodiment 2 of the present invention. Such as Figure 5 As shown, the electronic device 500 may inclu...

Embodiment 3

[0080] An embodiment of the present invention also provides a method for acquiring the true value of a character in a document image, which corresponds to the device for acquiring the true value of a character in a document image in Embodiment 1. Figure 6 is a schematic diagram of a method for acquiring the true value of a character in a document image according to Embodiment 3 of the present invention. Such as Figure 6 As shown, the method includes:

[0081] Step 601: Transform the document image according to the current transformation matrix between the document image and the standard image;

[0082] Step 602: Partially match the image block in the transformed document image with the image block in the standard image to obtain a matching image block in the transformed document image that matches the image block in the standard image, thereby obtaining a corresponding image block in the document image corresponding to the matching image block;

[0083] Step 603: Calculat...

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Abstract

The embodiment of the invention provides a character true value obtaining device and method for document images and an electronic device. In a partial matching mode, marked image blocks and active areas are updated according to matching errors and offset, and a conversion matrix is updated according to features in the active areas. Character true values of various document images can be obtained,an application range is wide, and the obtained true values are relatively high in accuracy.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a device and method for acquiring the true value of characters of a document image, and electronic equipment. Background technique [0002] With the popularity of electronic devices such as digital cameras and mobile devices, document recognition and analysis based on digital cameras or mobile devices has received more and more attention. Thanks to the ease of use and portability of digital cameras and mobile devices, users are able to capture images of documents at any time. However, the quality of the document image taken by the user is affected by more uncertain factors than the traditional scanned image of the document. For example, the documents taken by the user may be warped, bent, deformed, and blurred. [0003] Although the optical character recognition (Optical Character Recognition, OCR) technology for scanned documents is relatively mature, if it is s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F16/583G06K9/20
Inventor 范伟
Owner FUJITSU LTD