K Filter

Description Apply spatial anti-aliasing filter to volume before downsampling.
Module(s) Image Gather Processes
Requirements Volume
Related Header and Trace Interpolation
Works with Gathers

K Filter is a spatial anti-aliasing filter for use prior to spatial downsampling (with Header and Trace Interpolation). It applies a mute in F-K space, muting K values larger than the new Nyquist following downsampling, with an adjustable taper.

Best practice is to spatially de-alias the data  using F-X interpolation  (with Header and Trace Interpolation) prior to K filtering and downsampling.

  1. In the Control Panel, open the Process tab.
  2. At the tab header, click the Add icon and select New Process.
  3. Scroll down and double-click on K Filter.
  4. Type a name for the process and click OK.

Configuring K Filter

Smooth a 2D/3D volume
  1. Volume: Select the input volume.
  2. Downsampling Factor: The factor by which the data is to be spatially downsampled e.g. 2 if every other trace will be dropped.
  3. Taper (%): Width of the mute taper as a percentage of the downsampled K range e.g. if the downsampled K range is [-511, 511] then a taper of 15% will taper in the ranges [-511, 357] and [357, 511].