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Objective Evaluation of Laser Markings for Quality Control

초록

영어

This paper presents a novel method for the objective quality evaluation of letterings at the example of laser markings. The proposed method enables an automated quality evaluation during random inspection of small quantities of frequently changing items. The markings are segmented from the image within a first step and compared against a master piece in the second step. Each character and contour is evaluated with regard to completeness, contrast, edge width and homogeneity according to quality criteria based on the human visual perception. Thus our approach provides an user-independent evaluation method with high repeatability and reproducibility for its industrial application.

목차

Abstract
 1. Introduction
 2. Marking evaluation
  2.1. Marking segmentation and template matching
  2.2. Distortion correction by raster alignment
  2.3. Poll about human perception
  2.4. Evaluation methods
 3. System construction
 4. Verification
 5. Conclusion
 References

저자정보

  • Christian Teutsch Fraunhofer Institute for Factory Operation and Automation (IFF)
  • Dirk Berndt Fraunhofer Institute for Factory Operation and Automation (IFF)
  • Jost Schnee Fraunhofer Institute for Factory Operation and Automation (IFF)
  • Matthias Hübner Siemens AG, Industry Sector, I IA CD CC FTQ 31
  • Norbert Bachfischer Siemens AG, Industry Sector, I IA CD CC FTQ 31

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