30 June 1998 Fringe processing in nonregular domains by boundary-fitted image mapping
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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.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Armando Albertazzi, Armando Albertazzi, } "Fringe processing in nonregular domains by boundary-fitted image mapping", Proc. SPIE 3478, Laser Interferometry IX: Techniques and Analysis, (30 June 1998); doi: 10.1117/12.312936; https://doi.org/10.1117/12.312936


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