Wavelet Toolbox

Two-Dimensional Wavelet Capabilities

The basic two-dimensional objects are as follows.

	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

D_k stands for

, the horizontal, vertical and diagonal details at level k.

The same holds for cD_k 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.

One-Dimensional Wavelet Capabilities

Dealing with Border Distortion