Automatic optical flank wear measurement of microdrills using level set for cutting plane segmentation

作者：Duan Guifang^*; Chen Yen Wei; Sukegawa Takeshi

来源：Machine Vision and Applications, 2010, 21(5): 667-676.

DOI：10.1007/s00138-010-0259-y

• Microdrill bit
• Automatic optical inspection
• Level set
• Cutting plane segmentation
• Wear measurement

We address the problem of automatic optical flank wear measurement for microdrill bits' inspection. Cutting plane segmentation of microdrill bits is a fundamental step in the measurement. However, in the case of smeared microdrill bits, cutting planes cannot be segmented correctly by conventional methods. To exactly extract the cutting plane, a level set technique is proposed to segment it from a drill bit image; then we adopt a projection profile-based method for measuring the features of flank wear of microdrills. A new feature of flank wear, called "end wear length", is also introduced for flank wear evaluation with three other existing features. Experimental results indicate that it is a robust and effective approach for automatic flank wear measurement of microdrills in printed circuit board (PCB) manufacturing.

• 出版日期2010-8