This is an IQM plugin to compute the PPI index for binary digital images. This index represents the compactness of an object.
PPI is computed with the FFI index and the Lacunarity using the ToW algorithm:
PPI = FFI^(Ltw)
For FFI, please see:
https://sourceforge.net/projects/iqm-plugin-ffi/
Andronache etal. Fractal analysis for studying the evolution of forests, Chaos, Solitons & Fractals, 2016, Vol 91, 310-318.
For Tug of War Lacunarity, please see:
Reiss, Lemmerer, Hanslmeier, Ahammer Tug-of-War Lacunarity-A Novel Approach for Estimating Lacunarity. ...