gcrcrec: Crazy Climbers Reconstruction by Penalization

Description Usage Arguments Details Value References See Also

Description

Reconstructs a real-valued signal from ridges found by crazy climbers on a Gabor transform.

Usage

1
2
3
gcrcrec(siginput, inputgt, beemap, nvoice, freqstep, scale, compr,
        bstep=5, ptile=0.01, epsilon=0, fast=TRUE, para=5, minnbnodes=3,
        hflag=FALSE, real=FALSE, plot=2)

Arguments

siginput

original signal.

inputgt

Gabor transform.

beemap

occupation measure, output of crc.

nvoice

number of frequencies.

freqstep

sampling step for frequency axis.

scale

size of windows.

compr

compression rate to be applied to the ridges.

bstep

size (in the time direction) of the steps for chaining.

ptile

threshold of ridge

epsilon

constant in front of the smoothness term in penalty function.

fast

if set to TRUE, uses trapezoidal rule to evaluate Q_2.

para

scale parameter for extrapolating the ridges.

minnbnodes

minimal number of points per ridge.

hflag

if set to FALSE, uses the identity as first term in the kernel. If not, uses Q_1 instead.

real

if set to TRUE, uses only real constraints.

plot
1

displays signal,components, and reconstruction one after another.

2

displays signal, components and reconstruction.

Details

When ptile is high, boundary effects may appear. para controls extrapolation of the ridge.

Value

Returns a structure containing the following elements:

rec

reconstructed signal.

ordered

image of the ridges (with different colors).

comp

2D array containing the signals reconstructed from ridges.

References

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

See Also

crc, cfamily, crcrec, scrcrec.


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

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