Joishi, R.Reddy, K.P.J.Hegde, G.M.2026-02-062010Proceedings of SPIE - The International Society for Optical Engineering, 2010, Vol.7522, , p. -0277786Xhttps://doi.org/10.1117/12.852751https://idr.nitk.ac.in/handle/123456789/33108An improved technique based on active contours approach is presented for the analysis of non-uniform finite fringe interferograms. The technique is validated by demonstrating its application in analyzing the interferomertic image having non-uniform fringe pattern generated by a supersonic flow in front of a blunt body. A filtering method for identifying the flow parameters is presented as an extension of this technique. Proposed technique also provides an estimate of the heterodyning spatial frequency. © 2010 SPIE.Active contoursDigital holographyFringe evaluationNon-uniform interferogram