Special Section on Digital Photoelasticity: Advancements and Applications

Red-green bicolor photoelasticity using a single-color image

[+] Author Affiliations
Digendranath Swain, Binu P. Thomas, Jeby Philip

Indian Space Research Organization, Vikram Sarabhai Space Center, Structural Engineering Entity, Experimental Mechanics Division, Thiruvananthapuram 695 022, Kerala, India

Opt. Eng. 54(8), 081204 (Feb 26, 2015). doi:10.1117/1.OE.54.8.081204
History: Received October 29, 2014; Accepted January 14, 2015
Text Size: A A A

Abstract.  Conventional RGB or tricolor photoelasticity processes the intensity information of the red, green, and blue color planes to demodulate the photoelastic fringe orders (or isochromatics). We explore the possibility of isochromatic demodulation using the intensity data of only the red and green color planes drawn from a single-color image. This would help in avoiding the uncertainties caused due to the blue color plane in RGB photoelasticity. Moreover, a new procedure is proposed for isochromatic demodulation using a synthetically generated look-up table (LUT) to address the tint and intensity variations between the calibration and analysis images. The proposed method has been validated and extended to analyze live models and stress frozen slices. The results show that the proposed bicolor technique has the potential for demodulating higher fringe orders using generic white light sources with acceptable accuracy. Moreover, the bicolor algorithm consumes 13% less computational time than the tricolor algorithm.

Figures in this Article
© 2015 Society of Photo-Optical Instrumentation Engineers

Citation

Digendranath Swain ; Binu P. Thomas and Jeby Philip
"Red-green bicolor photoelasticity using a single-color image", Opt. Eng. 54(8), 081204 (Feb 26, 2015). ; http://dx.doi.org/10.1117/1.OE.54.8.081204


Access This Article
Sign in or Create a personal account to Buy this article ($20 for members, $25 for non-members).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging & repositioning the boxes below.

Related Book Chapters

Topic Collections

Advertisement
  • Don't have an account?
  • Subscribe to the SPIE Digital Library
  • Create a FREE account to sign up for Digital Library content alerts and gain access to institutional subscriptions remotely.
Access This Article
Sign in or Create a personal account to Buy this article ($20 for members, $25 for non-members).
Access This Proceeding
Sign in or Create a personal account to Buy this article ($15 for members, $18 for non-members).
Access This Chapter

Access to SPIE eBooks is limited to subscribing institutions and is not available as part of a personal subscription. Print or electronic versions of individual SPIE books may be purchased via SPIE.org.