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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 50, Iss. 27 — Sep. 20, 2011
  • pp: 5263–5270

Improvement of digital photoelasticity based on camera response function

Shih-Hsin Chang and Hsien-Huang P. Wu  »View Author Affiliations

Applied Optics, Vol. 50, Issue 27, pp. 5263-5270 (2011)

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Studies on photoelasticity have been conducted by many researchers in recent years, and many equations for photoelastic analysis based on digital images were proposed. While these equations were all presented by the light intensity emitted from the analyzer, pixel values of the digital image were actually used in the real calculations. In this paper, a proposal of using relative light intensity obtained by the camera response function to replace the pixel value for photoelastic analysis was investigated. Generation of isochromatic images based on relative light intensity and pixel value were compared to evaluate the effectiveness of the new approach. The results showed that when relative light intensity was used, the quality of an isochromatic image can be greatly improved both visually and quantitatively. We believe that the technique proposed in this paper can also be used to improve the performance for the other types of photoelastic analysis using digital images.

© 2011 Optical Society of America

OCIS Codes
(100.2000) Image processing : Digital image processing
(120.4290) Instrumentation, measurement, and metrology : Nondestructive testing

ToC Category:
Instrumentation, Measurement, and Metrology

Original Manuscript: March 23, 2011
Revised Manuscript: June 4, 2011
Manuscript Accepted: August 2, 2011
Published: September 15, 2011

Shih-Hsin Chang and Hsien-Huang P. Wu, "Improvement of digital photoelasticity based on camera response function," Appl. Opt. 50, 5263-5270 (2011)

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