| This abstract class extends the WaveletTransform one with the specifics of
inverse wavelet transforms.
The image can be reconstructed at different resolution levels. This is
controlled by the setResLevel() method. All the image, tile and component
dimensions are relative the the resolution level being used. The number of
resolution levels indicates the number of wavelet recompositions that will
be used, if it is equal as the number of decomposition levels then the full
resolution image is reconstructed.
It is assumed in this class that all tiles and components the same
reconstruction resolution level. If that where not the case the
implementing class should have additional data structures to store those
values for each tile. However, the 'recResLvl' member variable always
contain the values applicable to the current tile, since many methods
implemented here rely on them.
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