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Front. Inform. Technol. Electron. Eng.  2013, Vol. 14 Issue (7): 551-560    DOI: 10.1631/jzus.CIDE1308
    
Extracting 3D model feature lines based on conditional random fields
Yao-ye Zhang, Zheng-xing Sun, Kai Liu, Mo-fei Song, Fei-qian Zhang
State Key Laboratory for Novel Software Technology, Nanjing University, Nanjing 210046, China
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Abstract  We propose a 3D model feature line extraction method using templates for guidance. The 3D model is first projected into a depth map, and a set of candidate feature points are extracted. Then, a conditional random fields (CRF) model is established to match the sketch points and the candidate feature points. Using sketch strokes, the candidate feature points can then be connected to obtain the feature lines, and using a CRF-matching model, the 2D image shape similarity features and 3D model geometric features can be effectively integrated. Finally, a relational metric based on shape and topological similarity is proposed to evaluate the matching results, and an iterative matching process is applied to obtain the globally optimized model feature lines. Experimental results showed that the proposed method can extract sound 3D model feature lines which correspond to the initial sketch template.

Key wordsNonphotorealistic rendering      Model feature lines      Conditional random fields      Feature line metrics      Iterative matching     
Received: 29 December 2012      Published: 05 July 2013
CLC:  TP391  
Cite this article:

Yao-ye Zhang, Zheng-xing Sun, Kai Liu, Mo-fei Song, Fei-qian Zhang. Extracting 3D model feature lines based on conditional random fields. Front. Inform. Technol. Electron. Eng., 2013, 14(7): 551-560.

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http://www.zjujournals.com/xueshu/fitee/10.1631/jzus.CIDE1308     OR     http://www.zjujournals.com/xueshu/fitee/Y2013/V14/I7/551


Extracting 3D model feature lines based on conditional random fields

We propose a 3D model feature line extraction method using templates for guidance. The 3D model is first projected into a depth map, and a set of candidate feature points are extracted. Then, a conditional random fields (CRF) model is established to match the sketch points and the candidate feature points. Using sketch strokes, the candidate feature points can then be connected to obtain the feature lines, and using a CRF-matching model, the 2D image shape similarity features and 3D model geometric features can be effectively integrated. Finally, a relational metric based on shape and topological similarity is proposed to evaluate the matching results, and an iterative matching process is applied to obtain the globally optimized model feature lines. Experimental results showed that the proposed method can extract sound 3D model feature lines which correspond to the initial sketch template.

关键词: Nonphotorealistic rendering,  Model feature lines,  Conditional random fields,  Feature line metrics,  Iterative matching 
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