Character identification method and character identification apparatus

A technology for character recognition and recognition results, which is applied in the field of character recognition and can solve problems such as low recognition rate of manuscripts

Active Publication Date: 2014-08-27
SHANDONG NEW BEIYANG INFORMATION TECH CO LTD
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Problems solved by technology

[0004] The main purpose of the present invention is to provide a character recognition method and a character recognition device to solve the problem that the traditional character recognition method is only suitable for recognizing manuscripts with high image contrast, but the recognition rate of manuscripts with low image contrast is low

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  • Character identification method and character identification apparatus
  • Character identification method and character identification apparatus

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Embodiment Construction

[0031] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0032] figure 2 It is a schematic diagram of the module composition of the character recognition device according to an embodiment of the present invention. As shown in the figure, the character recognition device 10 includes: an acquisition unit 11 , a selection unit 12 , a binarization processing unit 13 , a recognition unit 14 , a calculation unit 15 and a judgment unit 16 .

[0033]The obtaining unit 11 is configured to obtain a threshold array TH, wherein the threshold array TH includes a plurality of thresholds. For example, the input original image can be calculated first to obtain the basic threshold T0, wherein the original image is the grayscale image of the area where the characte...

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Abstract

Disclosed are a character identification method and a character identification apparatus. The character identification method comprises: obtaining a threshold array; selecting a first threshold from the threshold array as a selected threshold; performing binarization processing on a character image by using the selected threshold to obtain a binary image of the character image; performing character identification on the binary image to obtain an identification result; calculating a confidence of the identification result; determining whether the confidence of the identification result is greater than a preset confidence value; if the confidence of the identification result is greater than the preset confidence value, using the identification result as an identification result of the character image; and if the confidence of the identification result is not greater than the preset confidence value, selecting a second threshold from the threshold array, and replacing the first threshold by using the second threshold as a selected threshold. By means of the present invention, the problem is solved that the conventional character identification method is only applicable for identifying an original copy with a high image contrast and the identification rate of an original copy with a low image contrast is low.

Description

technical field [0001] The present invention relates to the field of character recognition, in particular to a character recognition method and a character recognition device. Background technique [0002] Traditional character recognition methods include: a) scanning to obtain the grayscale image of the original; b) obtaining the threshold by analyzing and calculating the grayscale histogram of the acquired image, and binarizing the grayscale image according to the threshold to obtain Binary image; c) Perform character cutting on the binary image, compare the cut character block with the template character, and select the character most similar to the template character as the recognition character. [0003] In the traditional character recognition method, the methods for threshold calculation include Otsu method, NiBlack method, minimum error method or maximum entropy method, etc. The inventors found that no matter which method is used to obtain the threshold value, there...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/20G06V30/162G06V30/10
CPCG06K9/46G06V30/10G06V30/162
Inventor 邢月启许春凯董述恂王春涛
Owner SHANDONG NEW BEIYANG INFORMATION TECH CO LTD
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