gregrec: Reconstruction from a Ridge

Description Usage Arguments Value References See Also

Description

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

Usage

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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.


Rwave documentation built on May 2, 2019, 9:15 a.m.

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