Biomedical subjects

Jiawen Weng

Publications and source records attributed to Jiawen Weng.

2 recordsLinked to original sources

PubMed2005

Phase retrieval of optical fringe patterns from the ridge of a wavelet transform.

A new method for phase retrieval of optical fringe patterns is presented. This method is based on a wavelet transform and is capable of extracting the full 2D phase distribution from a single fringe pattern. An important conclusion that the phase of the optical fringe pattern is equal to the phase of its wavelet transform on the ridge of the wavelet transform is theoretically clarified. The method is compared with the Fourier transform and the integration methods. A numerical simulation and an experimental example of phase retrieval are shown.

Algorithms↗

PubMed2004

Spatial carrier-fringe pattern analysis by means of wavelet transform: wavelet transform profilometry.

We present an analysis of a spatial carrier-fringe pattern in three-dimensional (3-D) shape measurement by using the wavelet transform, a tool excelling for its multiresolution in the time- and space-frequency domains. To overcome the limitation of the Fourier transform, we introduce the Gabor wavelet to analyze the phase distributions of the spatial carrier-fringe pattern. The theory of wavelet transform profilometry, an accuracy check by means of a simulation, and an example of 3-D shape measurement are shown.

Algorithms↗