Phase-unwrapping algorithm for noisy phase-map processing

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Bernabeu Martínez, Eusebio
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The Optical Society of America
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Automated fringe-pattern processing is important in a great number of industrial applications, such as optical data testing and quality control. One of the main problems that arises with these processes is the automated phase unwrapping of the phase map associated with the fringe pattern. Usually the phase map presents problems such as noise, and low-modulation areas. A new phase-unwrapping algorithm with high noise immunity is presented. The algorithm is easily implemented and can process arbitrary shapes. The main features of this algorithm are the use of a queue for the processing of arbitrary shapes and a selection criterion that determines which pixels are going to be processed.
© 1994 Optical Society of America. The authors thank H. Steinbichler and all the nice people at Steinbichler Optotechnik GmbH for their support and friendship and also for the image of Fig. 7. This work was partially supported by BRITE/ EURAM project 3599, BREU 0120-C, and MAT 91-1389-CE.
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