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About ComsystanJ

ComsystanJ (Complex Systems Analysis for ImageJ) is a collection of ImageJ2/Fiji plugins to compute the complexity, fractal dimension and other nonlinear measures of images and signals. It is recommended to use it with Fiji. Developed and maintained by Helmut Ahammer.

List of image(2D) plugins

  • Image opener
  • Image generator (Random, Fractal surface, Hirarchical random map, IFS, Menger carpet, Sierpinski triangle, Koch snowflake, Fern, Heighway dragon,…)
  • Box counting dimension
  • Pyramid dimension
  • Minkowski dimension
  • Correlation dimension
  • Directional correlation dimension
  • Generalized dimensions
  • Higuchi dimension 1D
  • Higuchi dimension 2D
  • FFT dimension
  • Tug of war dimension
  • Lacunarity
  • Succolarity
  • Fractal fragmentation indices
  • Generalised entropies
  • Kolmogorov complexity and Logical depth

List of time signal plugins

  • Signal opener
  • Signal generator (Constant, Sine, Square, Triangle, Sawtooth, Gaussian/Uniform noise, Discrete chaotical maps (Logistic, Henon, Cubic, Spence) Fractional Gaussian noise/motion, Weierstraß-Mandelbrot)
  • Cutting out
  • Resampling
  • Mathematics (Differentiation, Integration, Exp, Ln, Log, Sin, Cos, Tan)
  • Surrogates (Shuffle, Gaussian, Random phase, AAFT)
  • Filter (Moving average, Moving Median)
  • FFT (Power spectrum, Magnitude spectrum)
  • Statistics (N, Min, Max, Median, RMS, Mean, SD, Kurtosis, Skewness, Sum, Sum of squares)
  • Event detection (peaks, valleys, slopes, or QRS peaks)
  • QRS peak detection (from file)
  • Standard HRV measurements (MeanHR, MeanNN, SDNN, SDANN, SDNNI, HRVTI, RMSSD, SDSD, NN50, PNN50, NN20, PNN20, ULF, VLF, LF, HF, LFnorm, HFnorm, LF/HF, TP)
  • Poincare plot
  • Detrended fluctuation analysis
  • Hurst coefficient
  • Higuchi dimension
  • Katz dimension
  • Sevcik dimension
  • RSE dimension (Roughness dimension)
  • Sample entropy
  • Approximate entropy
  • Permutation entropy
  • Generalised entropies (SE, H1, H2, H3, Renyi, Tsallis, SNorm, SEscort, SEta, SKappa, SB, SBeta, SGamma)
  • Kolmogorov complexity and Logical depth
  • Allometric scaling
  • Symbolic aggregation


You can download ComsystanJ here


Unzip the file and copy the folder to the Fiji’s plugin folder

Homepage and description



Helmut Ahammer e-mail