Wavelet Toolbox

Wavelet Packet Tool Features (1-D and 2-D)

For descriptions of the Wavelet Packet 1-D and Wavelet Packet 2-D tools, refer to Using Wavelet Packets. These tools are almost identical in their layout and function. The only difference involves the extra coloration modes available in the Wavelet Packet 1-D tool, as well as the ability of the tools to work with signals or images, as appropriate. Let us focus on the 1-D capabilities.

Coefficients Coloration

NAT or FRQ is for Natural or Frequency order (see Wavelet Packet Atoms).

By level or Global is for a coloration made level by level or taking all detail levels.

abs is used to take the absolute values of coefficients.

Node Action

When you select a node in the tree, the selected option is performed. A complete description of options is provided in the following sections.

Node Label

The node labels can be changed using the pop-up menu. For example, the Type option labels the nodes with (a) for approximation and (d) for detail.

Wavelet 2-D Tool Features

Node Action Functionality