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Two-Dimensional Wavelet Capabilities

Basic two-dimensional objects.   


Objects
Description
Image in original resolution
s
Original image
A0
Approximation at level 0
Ak, 1 k j
Approximation at level k
Dk, 1 k j
Details at level k
Coefficients in scale-related resolution
cAk, 1 k j
Approximation coefficients at level k
cDk, 1 k j
Detail coefficients at level k
[cAj, cDj, ..., cD1]
Wavelet decomposition at level j

Dk stands for , the horizontal, vertical, and diagonal details at level k.

The same holds for cDk, which stands for .

The two-dimensional M-files are exactly the same as those for the one-dimensional case, but with a 2 appended on the end of the command.

For example, idwt becomes idwt2. For more information, see One-Dimensional Wavelet Capabilities.

To illustrate the command line mode for two-dimensional capabilities, see the section Two-Dimensional Analysis Using the Command Line.


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