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Front. Inform. Technol. Electron. Eng.  2012, Vol. 13 Issue (11): 840-849    DOI: 10.1631/jzus.C1200065
    
Void defect detection in ball grid array X-ray images using a new blob filter
Shao-hu Peng, Hyun Do Nam
Department of Electronics and Electrical Engineering, Dankook University, Yongin 448-701, Korea
Void defect detection in ball grid array X-ray images using a new blob filter
Shao-hu Peng, Hyun Do Nam
Department of Electronics and Electrical Engineering, Dankook University, Yongin 448-701, Korea
 全文: PDF 
摘要： Ball grid arrays (BGAs) have been used in the production of electronic devices/assemblies because of their advantages of small size, high I/O port density, etc. However, BGA voids can degrade the performance of the board and cause failure. In this paper, a novel blob filter is proposed to automatically detect BGA voids presented in X-ray images. The proposed blob filter uses the local image gradient magnitude and thus is not influenced by image brightness, void position, or component interference. Different sized average box filters are employed to analyze the image in multi-scale, and as a result, the proposed blob filter is robust to void size. Experimental results show that the proposed method obtains void detection accuracy of up to 93.47% while maintaining a low false ratio. It outperforms another recent algorithm based on edge detection by 40.69% with respect to the average detection accuracy, and by 16.91% with respect to the average false ratio.
关键词： Ball grid array (BGA);  X-ray;  Defect detection;  Blob detection;  Void detection    
Abstract: Ball grid arrays (BGAs) have been used in the production of electronic devices/assemblies because of their advantages of small size, high I/O port density, etc. However, BGA voids can degrade the performance of the board and cause failure. In this paper, a novel blob filter is proposed to automatically detect BGA voids presented in X-ray images. The proposed blob filter uses the local image gradient magnitude and thus is not influenced by image brightness, void position, or component interference. Different sized average box filters are employed to analyze the image in multi-scale, and as a result, the proposed blob filter is robust to void size. Experimental results show that the proposed method obtains void detection accuracy of up to 93.47% while maintaining a low false ratio. It outperforms another recent algorithm based on edge detection by 40.69% with respect to the average detection accuracy, and by 16.91% with respect to the average false ratio.
Key words: Ball grid array (BGA)    X-ray    Defect detection    Blob detection    Void detection
收稿日期: 2012-03-15 出版日期: 2012-11-02
CLC:  TP391  
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引用本文:

Shao-hu Peng, Hyun Do Nam. Void defect detection in ball grid array X-ray images using a new blob filter. Front. Inform. Technol. Electron. Eng., 2012, 13(11): 840-849.

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http://www.zjujournals.com/xueshu/fitee/CN/10.1631/jzus.C1200065    或    http://www.zjujournals.com/xueshu/fitee/CN/Y2012/V13/I11/840

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