Frequency Split

Description Splits an input volume into N output volumes.
Module(s) Image Gather Processing Explorationist
Requirements Volume
Works with 2D, Stacks, Gathers

Splits an input volume into N output volumes, corresponding to different frequency bands of the original volume, by successively applying low-pass Butterworth filters and subtracting the filtered result from the input.

Create Frequency Split

Create angle stacks process
  1. In the Control Panel, open the Process tab.
  2. Click the blue "+" icon and select New Process.
  3. Search and double-click Frequency Split.
  4. Type a name for the process and click OK.

Define settings for Frequency Split

Define settings for angle stacks
  1. Select the Volume.
  2. Filter slope: Must be a negative value.
  3. Click the blue "+" icon to add the Frequency band.
  4. Frequency bands: Specified in terms of -6dB (50% amplitude) points of consecutive low-pass filters. Note that the frequency band definition of -6dB differs from the band-pass filter definition of -3dB. This is required to ensure the lower frequency value of a band is also -6dB.