gregrec {Rwave}R Documentation

Reconstruction from a Ridge

Description

Reconstructs signal from a “regularly sampled” ridge, in the Gabor case.

Usage

gregrec(siginput, gtinput, phi, nbnodes, nvoice, freqstep, scale,
epsilon=0, fast=FALSE, plot=FALSE, para=0, hflag=FALSE, real=FALSE,
check=FALSE)

Arguments

siginput input signal.
gtinput Gabor transform, output of cgt.
phi unsampled ridge.
nbnodes number of nodes used for the reconstruction.
nvoice number of different scales per octave
freqstep sampling rate for the frequency axis
scale size parameter for the Gabor function.
epsilon coefficient of the Q_2 term in reconstruction kernel
fast if set to T, the kernel is computed using trapezoidal rule.
plot if set to TRUE, displays original and reconstructed signals
para scale parameter for extrapolating the ridges.
hflag if set to TRUE, uses Q_1 as first term in the kernel.
real if set to TRUE, uses only real constraints on the transform.
check if set to TRUE, computes cwt of reconstructed signal.

Value

Returns a list containing:
sol reconstruction from a ridge.
A <gaborlets,dualgaborlets> matrix.
lam coefficients of dual wavelets in reconstructed signal.
dualwave array containing the dual wavelets.
gaborets array containing the wavelets on sampled ridge.
solskel Gabor transform of sol, restricted to the ridge.
inputskel Gabor transform of signal, restricted to the ridge.
Q2 second part of the reconstruction kernel.

References

See discussions in the text of “Practical Time-Frequency Analysis”.

See Also

regrec.


[Package Rwave version 1.24-2 Index]