Crazy Climbers Reconstruction by Penalization
Reconstructs a real-valued signal from ridges found by crazy climbers on a Gabor transform.
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)
occupation measure, output of
number of frequencies.
sampling step for frequency axis.
size of windows.
compression rate to be applied to the ridges.
size (in the time direction) of the steps for chaining.
threshold of ridge
constant in front of the smoothness term in penalty function.
if set to TRUE, uses trapezoidal rule to evaluate \(Q_2\).
scale parameter for extrapolating the ridges.
minimal number of points per ridge.
if set to FALSE, uses the identity as first term in the kernel. If not, uses \(Q_1\) instead.
if set to
TRUE, uses only real constraints.
displays signal,components, and reconstruction one after another.
displays signal, components and reconstruction.
ptile is high, boundary effects may appear.
controls extrapolation of the ridge.
Returns a structure containing the following elements:
image of the ridges (with different colors).
2D array containing the signals reconstructed from ridges.
See discussions in the text of “Practical Time-Frequency Analysis”.