Graphic text image segmentation method and system based on line cutting direction

An image segmentation and line technology, applied in the field of image processing, can solve problems such as easy breakage of objects, achieve the effect of improving segmentation quality and reducing line breakage

Active Publication Date: 2016-03-02
NANJING UNIV OF SCI & TECH
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Problems solved by technology

[0005] In order to overcome the situation that the target in the graphic text image is easy to break in the prior art, the present invention provides a graphic text image segmentation method and system based on the tangential direction of the line

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  • Graphic text image segmentation method and system based on line cutting direction
  • Graphic text image segmentation method and system based on line cutting direction
  • Graphic text image segmentation method and system based on line cutting direction

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Embodiment Construction

[0030] Such as figure 1 As shown, it is a flow chart of the graphic text image segmentation method based on the tangential direction of the line in this embodiment, including the following basic steps:

[0031] In step 101, an initial segmentation is performed on the original image to obtain a segmented binary image. In this embodiment, first, the conventional Otsu threshold method is used to binarize the original image to obtain a binary image; then, the binary image is subjected to point filtering to remove isolated noise points in the binary result image, and the binary image after the initial segmentation is obtained. value image. The points filter uses a 3*3 sliding window, and the target points are less than the specified threshold 3.

[0032] Step 102, thinning the binary image. In this embodiment, a morphological method is used to thin the binary image; then remove false branches in the thinned binary image, and use the detected leaf nodes as lines Endpoints; Finall...

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Abstract

The invention brings forward a graphic text image segmentation method and system based on a line cutting direction. Since a target in a graphic text image has a thin and long structure, the target exhibits the noticeable directivity feature, that is to say, the target exhibits relatively high correlation in a line cutting direction. The local area of the target is increased in the cutting direction of lines by utilizing the feature of the thin and long structure of the target, analyzing the local features of the target in the line cutting direction and also combining a dynamic area increase process during segment of a graphic text image, so line fracture in a segmentation result is effectively minimized and the segmentation quality of the image is improved.

Description

technical field [0001] The invention belongs to the technical field of image processing, and in particular relates to a method and a system for segmenting graphic text images based on the tangential direction of lines. Background technique [0002] Graphic text images have a large number of applications in daily life, such as document images, bill letter images, license plate images, traffic sign images, etc. A prominent feature of this type of image is that the target area in the image has a slender structure. Graphic text image segmentation is a key link in image understanding. The quality of segmentation results directly affects the overall performance of graphic text image understanding. Therefore, how to improve the segmentation quality of such images has always been a hot issue in the field of graphic text image processing. [0003] At present, the segmentation methods of graphic text images are mainly divided into two categories: global methods and local methods. The...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00
Inventor 张重阳陆建峰唐振民杨静宇
Owner NANJING UNIV OF SCI & TECH
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