Digital Signal Processing Reference
In-Depth Information
Figure 10.23. (top left) Masked area. From top to bottom and left to right,
the seven wavelet scales of the inpainted map are shown. From the visual
point of view, the initially masked area can no longer be distinguished in
the wavelet scales of the inpainted map. (
See color plates.
)
The IDL software (http://www.idl-envi.com) is analogous to MATLAB and
is very widely used in astrophysics and medical imaging. HEALPix is avail-
able online (http://sourceforge.net/projects/healpix). MR/S is a collection of IDL
files that implements all the multiscale transforms described in this chapter us-
ing HEALPix pixelization. The library is available via the topic's Web site
(http://www.SparseSignalRecipes.info).
10.9.2 Undecimated Wavelet Transform on the Sphere
The code to generate the undecimated wavelet transform of the Mars image of
Fig. 10.8 is as follows:
; read the data
m = mrs_read('mars_topo_mola_hpx_128.fits')
; compute the undecimated wavelet transform with 5 scales
