Abstract: This paper deals with the theories and techniques of automatic evaluation and recognition of digital holographic interferogram. As a result, a software system of automatic fringe pattern evaluation and recognition has been developed for a general purpose digital image processing system, which possesses all necessary functions, including fringe pattern acquiring, locating, preprocessing, skeletonizing, thinning, mending and. smoothing, fringe order numbering, interpolating, and evaluating 3-D amplitude field. It is helpful to analysis of other fringe patterns, such as Moire fringe patterns and speckle interferograms, although they were developed for vibration holographic measurement.

Key words: measurement, holography, laser digital image processing, interferometry