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Interactive contour extraction method

A contour extraction and interactive technology, applied in the field of video processing, can solve problems such as the inability to obtain smooth and accurate object contours and poor contour quality

Active Publication Date: 2018-10-16
SOUTH CHINA UNIV OF TECH
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  • Description
  • Claims
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Problems solved by technology

However, the quality of the contour obtained by the image segmentation method is poor, and it is impossible to obtain a smooth and accurate object contour.

Method used

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Embodiment Construction

[0063] The present invention will be further described below in conjunction with specific examples.

[0064] Such as figure 1 As shown, the interactive contour extraction method provided in this embodiment includes the following steps:

[0065] 1) Establish the l-d axis coordinate system, initialize with the user interaction sketch, and establish the l-d axis coordinate system centered on the initial curve;

[0066] 2) Extraction of local contour lines, modeling the process of finding local contour lines in the l-d axis coordinate system as a problem of maximizing the energy function, and using dynamic programming to solve local optimal solutions;

[0067] 3) Generation of multi-scale local contour line sets, extracting densely overlapping local contour line sets of different lengths on the initialization curve;

[0068] 4) Global contour fusion, using a wPCA-based method to extract a global contour from a redundant set of local contours.

[0069] In step 1), the described ...

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Abstract

The invention discloses an interactive contour extraction method. The method comprises the steps that 1), 1-d axis coordination system establishing: a user interactive script is taken as initialization to establish a 1-d axis coordination system taking an initial curve as the center; 2), local contour line extraction, the process of finding local contour lines in the 1-d axis coordination system is modeled as the problem of a maximized energy function, and the locally optimal solution is solved by using dynamic programming; 3), multi-scale local contour line set generation: local contour linesets with different lengths and densely overlapped are extracted from the initial curve; 4), global contour line fusion: a method based on wPCA is used, and a global contour line is extracted from a redundant local contour line set. By means of the method, any complicated object contour can be presented, and the method has the advantages of being accurate, convenient, less in user interaction, fast in running speed and continuous and smooth in the global contour line.

Description

technical field [0001] The present invention relates to the technical field of video processing, in particular to an interactive contour extraction method. Background technique [0002] With the rapid development of computer vision and image processing, the application range of its related technologies is becoming wider and wider, especially in unmanned driving, face recognition, augmented reality (Augmented reality, abbreviated as AR), medical image processing and industrial Many new theories and methods have appeared in control and other aspects, and many excellent commercial applications have appeared, making this field familiar and concerned by more and more people. Object contour extraction or detection is one of the most important underlying processes in computer vision and image processing. It is used to extract the boundaries of objects in images and provide key contour information of objects in images. And this information can be used in many fields such as image s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/13G06T7/181
CPCG06T7/13G06T7/181G06T2207/20116
Inventor 聂勇伟曹旭李桂清
Owner SOUTH CHINA UNIV OF TECH
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