Automatic extraction of isotropic points-using min-max scanned photoelastic images

Terry Yuan Fang Chen, Yu Hsiang Fang, Han Sheng Lin

Research output: Contribution to journalConference articlepeer-review


A robust and accurate method is proposed to extract the isotropic points from min-max scanned photoelastic images automatically. The method uses a multiple layered window with four-change condition to extract the isotropic points. Test of this method on both the simulated and experimental obtained isoclinic images and direction images is shown. An exact position was found for the simulated images and a difference of about 1.4 pixels is achieved for the experimental ones. The whole scheme is very simple, fast, and effective to extract the isotropic point for structural design purpose.

Original languageEnglish
Article number135
Pages (from-to)856-861
Number of pages6
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume5852 PART II
Publication statusPublished - 2005 Dec 12
EventThird International Conference on Experimental Mechanics and Third Conference of the Asian Committee on Experimental Mechanics - Singapore, Singapore
Duration: 2004 Nov 292004 Dec 1

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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