gpcapsi: Generalized Principal components algorithm for phase shifting...

In mlpeck/zernike: Zernike Polynomials

Generalized Principal components algorithm for phase shifting interferometry

Description

A generalized principal components algorithm for phase shifting interferometry developed by the author. This is the “low level” implementation.

Usage

  gpcapsi(im.mat, ptol = 0.001, maxiter = 20, trace = 1)
  gpcapsiC(im.mat, ptol, maxiter, trace)

Arguments

im.mat	Matrix containing the unmasked pixels from a set of interferograms.
ptol	Convergence tolerance for phase shifts
maxiter	Maximum number of iterations
trace	Print progress of nonlinear solver every trace iterations. Use trace=0 for silent operation.

Details

gpcapsi is a wrapper to the C++ call in gpcapsiC.

Value

A list with the following items:

phi	Estimated wrapped phase.
mod	Estimated modulation.
phases	Estimated phase shifts.
snr	An estimate of the S/N of the interferograms.
eigen	Eigenvalues of the crossproduct matrix

Note

This is the low level interface to the algorithm. The matrix im.mat should contain the unmasked pixel values from the input interferogram array. No checks are made for valid data. This should normally be called through the high level function psifit.

Author(s)

M. L. Peck

See Also

pcapsi psifit

mlpeck/zernike documentation built on April 19, 2024, 3:16 p.m.