computes the inverse one-dimensional discrete wavelet transform (DWT) at a single level. The initialization routine c09aaf
must be called first to set up the DWT options.
performs the inverse operation of c09caf
. That is, given sets of
approximation coefficients and detail coefficients, computed by c09caf
using a DWT as set up by the initialization routine c09aaf
, on a real data array of length
will reconstruct the data array
from which the coefficients were derived.
If on entry
, explanatory error messages are output on the current error message unit (as defined by x04aaf
The accuracy of the wavelet transform depends only on the floating-point operations used in the convolution and downsampling and should thus be close to machine precision.
Background information to multithreading can be found in the Multithreading