计算机工程与应用 ›› 2010, Vol. 46 ›› Issue (10): 220-222.DOI: 10.3778/j.issn.1002-8331.2010.10.068

• 工程与应用 • 上一篇    下一篇

贴装元件的方差环形投影特征匹配识别

吴晖辉,张宪民,洪始良   

  1. 华南理工大学 机械与汽车工程学院,广州 510640
  • 收稿日期:2008-09-25 修回日期:2008-11-24 出版日期:2010-04-01 发布日期:2010-04-01
  • 通讯作者: 吴晖辉

Matching recognition of mounted components based on variance ring projection feature

WU Hui-hui,ZHANG Xian-min,HONG Shi-liang   

  1. Department of Mechanical Engineering and Automobile,South China University of Technology,Guangzhou 510640,China
  • Received:2008-09-25 Revised:2008-11-24 Online:2010-04-01 Published:2010-04-01
  • Contact: WU Hui-hui

摘要: 为了准确定位贴片后印刷电路板(PCB)上电子元件的位置,提出了一种基于方差环形投影的图像快速匹配算法。先将输入图像用小波变换分解为不同尺度的低频图像,之后利用方差环形投影特征做序贯相似性检测得到一系列可能的匹配点,最后在这些点上作相关匹配运算,获得其准确的位置。实验证明该算法大大减少了计算量又保持了匹配的精度,而且对图像的旋转不敏感。

关键词: 表面组装技术, 图像匹配, 小波变换, 方差环形投影, 序贯相似

Abstract: To locate the mounted electricity components in the Printed Circuit Board(PCB),a fast image matching algorithm based on variance ring projection is proposed.Firstly,an input image is decomposed into different low levels sub-image with the walvelet-transform.Then,after getting the variance ring projection feature,the Sequential Similarity Detection Algorithm(SSDA) is exploited to represent some potential matching points.Finally,based on these points,a precisely locating phase using the correlation is introduced to get the right position.Experimental results show this method significantly reduces the computational burden and is rotation-invariant,while the precision remained fine.

Key words: Surface Mount Technology(SMT), image matching, wavelet transform, variance ring projection, sequential similarity

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