On exit: the coefficients of the discrete wavelet transform. The
$8$ sets of coefficients are stored in the following order: approximation coefficients (LLL) first, followed by
$7$ sets of detail coefficients: LLH, LHL, LHH, HLL, HLH, HHL, HHH, where L indicates the low pass filter, and H the high pass filter being applied to, respectively, the columns of length
M, the rows of length
N and then the frames of length
FR. Note that for computational efficiency reasons each set of coefficients is stored in the order
${n}_{\mathrm{cfr}}\times {n}_{\mathrm{cm}}\times {n}_{\mathrm{cn}}$ (see output parameters
NWCFR,
NWCT and
NWCN in
C09ACF). See
Section 9 for details of how to access each set of coefficients in order to perform extraction from
C following a call to this routine, or insertion into
C before a call to the three-dimensional inverse routine
C09FBF.