A new ImageJ plug-in "actogramJ" for chronobiological analyses

Benjamin Schmid, Charlotte Helfrich-Förster, Taishi Yoshii

Research output: Contribution to journalArticlepeer-review

202 Citations (Scopus)


While the rapid development of personal computers and high-throughput recording systems for circadian rhythms allow chronobiologists to produce huge amounts of data, the software to analyze them often lags behind. Here, we announce newly developed chronobiology software that is easy to use, compatible with many different systems, and freely available. Our system can perform the most frequently used analyses: actogram drawing, periodogram analysis, and waveform analysis. The software is distributed as a pure Java plug-in for ImageJ and so works on the 3 main operating systems: Linux, Macintosh, and Windows. We believe that this free software raises the speed of data analyses and makes studying chronobiology accessible to newcomers.

Original languageEnglish
Pages (from-to)464-467
Number of pages4
JournalJournal of biological rhythms
Issue number5
Publication statusPublished - Oct 2011


  • ImageJ
  • Lomb-Scargle periodogram
  • actogram
  • chronobiological data
  • circadian rhythm
  • free software
  • Ξ2 periodogram

ASJC Scopus subject areas

  • Physiology
  • Physiology (medical)


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