Method and device for segmenting characters from video image

A technology in video images and images, applied in character and pattern recognition, instruments, computer components, etc., can solve problems such as complex background, text erosion, low resolution, etc., and achieve simple technical implementation, small amount of calculation, and good performance Effect

Inactive Publication Date: 2009-12-09
HANVON CORP
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Problems solved by technology

This type of method selects the point on the border of the text box as a seed, and uses the seed growth method to remove the connected body connected to the border. This method can achieve better results for images with better quality, but when the contrast is very low, or the text If it is the same color as the background and the border of the

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  • Method and device for segmenting characters from video image
  • Method and device for segmenting characters from video image
  • Method and device for segmenting characters from video image

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[0064] In order to make the above objectives, features and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0065] One of the purposes of character segmentation for a video image in the embodiments of the present invention is to remove the background from the positioned video character image to obtain a binarized character image for subsequent OCR recognition or other operations. Based on the above objective, one of the core concepts of the embodiments of the present invention is to use the stroke operator to extract the character strokes in the video character image, so that a large amount of reliable stroke pixel information can be directly obtained; then color modeling is performed on the stroke pixels to extract the characters The color layer image can be applied with a simple color model to achieve a better character segme...

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Abstract

The invention discloses a method for segmenting characters form a video image, which comprises the following steps: positioning an original character image in the video image; extracting character stroke information from the original character image, obtaining a binary stroke image of the original character image according to the character stroke information; establishing a color model aiming at a character region in the binary stroke image, extracting a color layer image of the character region according to the color model; and removing excess backgrounds and noise by using an improved connection body analysis method with stroke masks so as to obtain the target character image. The invention has little computation and good property and can rapidly and accurately segment the characters from the video image of the complex backgrounds without machine learning.

Description

technical field [0001] The invention relates to the field of video character recognition, in particular to a method for segmenting characters from video images and a device for segmenting characters from video images. Background technique [0002] As a high-level semantic feature, characters in video images play an important role in the understanding and indexing of video content. However, due to the low resolution of the video image, the complex background corresponding to the characters in the video image, and the large interference; and, the traditional OCR system can only accept the binarized text image, therefore, it is difficult to obtain accurate information from the complex background of the video image. Segmenting characters accurately is one of the important research topics in the field of video character recognition. [0003] In the prior art, methods for segmenting characters in videos mainly include the following three categories: [0004] The first category, ...

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Application Information

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IPC IPC(8): G06K9/32G06K9/72
Inventor 黄磊刘昌平程豪
Owner HANVON CORP
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