Fringe processing in nonregular domains by boundary-fitted image mapping

Armando Albertazzi Jr.

doi:10.1117/12.312936

30 June 1998 Fringe processing in nonregular domains by boundary-fitted image mapping

Armando Albertazzi Jr.

Proceedings Volume 3478, Laser Interferometry IX: Techniques and Analysis; (1998) https://doi.org/10.1117/12.312936
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1998, San Diego, CA, United States

Abstract

This paper presents an extension of generalized boundary- fitted coordinate systems to image and fringe processing. Through a non-linear boundary-fitted coordinate system, it is possible to apply a very convenient geometrical transformation in an image in order to map a non-regular domain into a rectangular domain. The approach is very flexible and it can be used to map a very large variety of shapes, including shapes with discontinuities, voids or holes, into a rectangular area. That can be used to handle image processing task where the shape of the area that contains the fringe patterns is non regular: a one by one image mapping is applied, and the fringe processing can very comfortably be accomplished in a rectangular domain. The measurement data can very easily be digitized in a naturally defined boundary-fitted digitizing mesh. A computationally efficient algorithm is also presented to allow very fast image mapping. Some application examples are given.

Citation Download Citation

Armando Albertazzi Jr. "Fringe processing in nonregular domains by boundary-fitted image mapping", Proc. SPIE 3478, Laser Interferometry IX: Techniques and Analysis, (30 June 1998); https://doi.org/10.1117/12.312936

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