threshold.imwdc {wavethresh} | R Documentation |
Applies hard or soft thresholding to wavelet decomposition object
of class imwdc
.
threshold.imwdc(imwdc, verbose=FALSE, ...)
imwdc |
Object of class "imwdc", maybe after a previous thresholding. |
verbose |
print information messages about what's going on |
... |
other arguments to threshold |
This function thresholds just like `threshold.imwd
', except that the
input is an "imwdc" object, not a "imwd" object, which suggests that
the object has already been thresholded (because threshold.imwd
returns an "imwdc" object). Because the object is likely to have
been thresholded a warning message stating this is printed.
However, it is entirely possible that you would wish to impose a higher threshold on an already thresholded object, and so this function does just this.
This function is a method for the generic function
threshold()
for class imwdc
.
It can be invoked by calling threshold(x)
for an
object x
of the appropriate class, or directly by
calling threshold.imwdc(x)
regardless of the
class of the object.
An object of class "imwdc", containing the thresholded object
Release 2.2 Copyright Guy Nason 1993
There should be an optimal policy as well, although universal comes close.
see wd
for a list.
For examples, see imwr.imwd
.
imwr
, imwd
, compress
,
uncompress
, imwd.object
,
imwdc.object