Abstract
Abstract In connection with digital interferometry, the evaluation of phase-shifted interferograms can be speeded up by a digital image processor. A special parallel algorithm has been designed for scanning the saw-tooth shaped fringes. It is shown that the number of image passes (TC cycles) for a 2 j × 2 j pixel image is reduced to j instead of 2j. Fringe scanning of a saw-tooth phase image and a pseudocoloured display of the continuous phase is obtained after 1·4s for 512 × 512 points.
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