Journal of South China University of Technology (Natural Science Edition) ›› 2011, Vol. 39 ›› Issue (8): 60-65.doi: 10.3969/j.issn.1000-565X.2011.08.011

• Mechanical Engineering • Previous Articles     Next Articles

Fast Image Mosaic Method for Large-Scale Workpiece Measurement System

Quan Yan-ming  Li Shu-mei   

  1. School of Mechanical and Automotive Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2011-01-17 Revised:2011-02-21 Online:2011-08-25 Published:2011-07-06
  • Contact: 全燕鸣(1957-) ，女，博士，教授，主要从事机器视觉应用技术、先进制造技术研究． E-mail:meymquan@ scut.edu.cn
  • About author:全燕鸣(1957-) ，女，博士，教授，主要从事机器视觉应用技术、先进制造技术研究．
  • Supported by:

    广东省科技攻关重点项目( 2009A010200002) ; 广州市科技攻关计划项目( 2006Z3-D9041)

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Abstract:

According to the characteristics of the image mosaic of the large-scale workpiece measurement system,an improved fast mosaic algorithm with high accuracy is proposed by combining the feature extraction with the template matching. In this algorithm,first,the feature points of two adjacent images are extracted by using the multiscale Harris operator. Then,in the first image,the templates are identified according to the distribution of the feature
points; and in the second image,the matching blocks are chosen by means of the template matching. Finally,the matching feature points in the matching blocks are detected by the feature matching,and the mosaic is thus completed. Experimental results show that the proposed algorithm greatly reduces the computation amount of the mosaic,effectively avoids the false matching which is easy to occur due to scarce features and large-scale similar areas of the workpiece,thus meeting the requirements of the measurement system.

Key words: image mosaic, large-scale workpiece, Harris corner, template matching