Method and device for acquiring character area image and character recognition system

A text area and image technology, applied in the field of image processing, can solve the problems of high probability of false detection, high cost, and the solution of text area images needs to be improved, so as to achieve the effect of reducing the probability of false detection.

Active Publication Date: 2011-09-14
VIMICRO ELECTRONICS CORP
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] However, on the one hand, due to the high cost of imaging equipment such as high-definition digital cameras and scanners, it is difficult to obtain these high-cost equipment in time in some cases; In the process, the text detection link used to obtain the text area image only gives the detection result based on the detection of a single frame image, and the text detection itself is greatly affected by interference factors, so the probability of false detection is still high
[0007] Therefore, in the existing text recognition process, the scheme for obtaining text area images still needs to be improved

Method used

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  • Method and device for acquiring character area image and character recognition system
  • Method and device for acquiring character area image and character recognition system
  • Method and device for acquiring character area image and character recognition system

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Embodiment 1

[0079] In the first embodiment, the target images to be processed are two frames of images selected from multiple target images. In the first embodiment, the set image feature parameter is the pixel value of the image.

[0080] see image 3 , image 3 It is a flow chart of character recognition in Embodiment 1, and the process may include the following steps:

[0081] Step 301 , performing text detection on each selected frame of the target image to obtain two candidate text region images.

[0082] The two candidate text region images may contain the same text content.

[0083] In this step 301, the text detection process is implemented based on the existing text detection technology, but the difference from the prior art is that in the process of the first embodiment, the detection result is not directly used to determine the text area image containing the text content, Instead, it is necessary to verify whether the detected candidate text region images indeed contain tex...

Embodiment 2

[0107] In the second embodiment, the preset image characteristic parameter is the chromaticity of the image.

[0108] see Figure 4 , Figure 4 It is a flow chart of character recognition in Embodiment 2 of the present invention, and the process may include the following steps:

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Abstract

The invention provides a character area image acquiring method, including: executing letter testing to at least two frames of target images, to obtain the candidate character area image on each frame of target image; executing inter-comparison process between the candidate character area image on one frame of target image with the candidate character area image on the other frames of target images that may contain the identical character content; if the difference between the inter-compared at least two candidate character area images is in the prearranged scope, determining that the at leasttwo candidate character area images pertain to the character area image including the character content; and acquiring the character area images. The invention also provides a character area image acquiring method and a character recognition system. The technical scheme provided by the embodiment of the invention has passed the verification to the character testing result, and reduces the miss-detection probability of the character testing.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a method and device for acquiring a character area image, and a character recognition system. Background technique [0002] The character recognition process mainly includes extracting a character region image corresponding to the character content from an image formed by photographing character data, performing character recognition based on the extracted character region image, and obtaining specific character content. [0003] see figure 1 , figure 1 It is a schematic diagram of the structure of the existing character recognition system. figure 1 Among them, the text detection module detects the text area image on a single frame image, and then the image processing module performs image quality optimization processing on the detected text area image, such as using filtering technology to filter out noise, followed by the text recognition module based on Text recogn...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/20G06K9/68
Inventor 王磊邓亚峰黄英
Owner VIMICRO ELECTRONICS CORP
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