<title>Problem of phase unwrapping for fringe pattern overlaid with random noise and segmented discontinuity</title>

Abstract

This paper presents a new phase unwrapping algorithm to deal with the problem of phase restoration from an interferogram that is in presence of both high-level random noise and segmented disconlinuity. The algorithm is based on a composite template matching to simultaneously identify unreasonable phase jumps caused by speckle noise and segmented discontinuilies such as holes and borders in the wrapped phase map. Examples unwrap with the inteiferograrns generated by the computer and real speckle fringe patterns taken from double-pulsed speckle interferometer are included to show that the technique is efficient and simple to implement.

3D computer vision system based on spatial phase mapping

“…The strategy and methodology for the software design of the vision system based on spatial phase mapping is discussed in detail. 3 . 1 The strategy of software architecture design It is well known that Windows programming has an evident feature of message-driven and VC++ provides a powerful foundation class library, i.e.…”

Intensity-modulated moiré topography

“…Bremand 12 presented an algorithm that avoids most of the inconsistencies of the phase field. Peng et al 13 presented a technique based on composite mask matching combined with a special phase-unwrapping algorithm.…”

“…Color-modulation techniques can also be used to solve unwrapping problems, as reported in Ref. 13. Color images contain more information than do monochrome images.…”