A new method for circular grid analysis in the sheet metal forming test

C. C. Wang, J. Lee, L. W. Chen, H. Y. Lai

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


Computer vision systems are employed to determine the major and minor lengths of deformed elliptic grids while determining a sheet metal's workability. The existing method identifies the ellipse using the least squares analysis. It suffers two drawbacks: assumptions in direct conflict with the observed real-world processes and an undesirable property of orientation dependence. For the remedy, this paper presents a new method that, in addition to achieving the desired property of orientation invariance, discards assumptions that conflict with real-world processes. The proposed method is implemented and tested using simulated and real-world data. Results are reported and compared with those obtained by the existing method.

Original languageEnglish
Pages (from-to)190-196
Number of pages7
JournalExperimental Mechanics
Issue number2
Publication statusPublished - 2000 Jun

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering
  • Mechanics of Materials
  • Mechanical Engineering


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