The Chord Length Distribution command is accessible from MatDict and PoroDict.

A Chord Length Distribution (CLD) is the distribution of the length of a typical chord of a structure. By being characteristic for any given geometry class, it is a highly precise and sensitive measure to compare the geometries of porous media. The calculation of CLD is particularly useful in 2D tomographic cross-sections, for which the pore size distribution cannot be determined by granulometry or by porosimetry.

The Chord Length is defined as the number of connected voxels along the computational direction. Pseudo-code of the algorithm used for the computation can be found in J. Ohser, F. Mücklich.

The Chord Length Distribution dialog opens when clicking the Edit… button.