Homer and AtlasViewer


Homer3 and AtlasViewer are MATLAB applications that provide an open-source platform for the analysis and display of fNIRS data.

Download  Homer3
Download AtlasViewer


Homer3 is the latest installment in the HOMER software series. It builds upon Homer2 by enabling custom processing scripts at subject and group levels. This will enable more powerful statistical analyses of these results results. Homer3 also implements the Shared NIR Data Format (SNIRF) that has been developed and adopted by a broad consortium of software and hardware developers. Please subscribe to the Homer3 community forum here on openfnirs.org! We are grateful to all of the Developers who have contributed to Homer and AtlasViewer over the years.

Please see the wikis for Homer3 and AtlasViewer to find documentation to guide you in using each software package. Training courses and webinars are available with data sets and exercises to help you better learn Homer3 and Atlasviewer.

Please use the Homer forum to ask questions and start discussions about the software.

If you are publishing papers using Homer2 or Homer3, we request that you cite this paper:

Huppert, T., Diamond, S., Franceschini, M., Boas, D. (2009). HomER: a review of time-series analysis methods for near-infrared spectroscopy of the brain. Applied optics 48(10). https://dx.doi.org/10.1364/ao.48.00d280

If you are publishing papers using AtlasViewer, we request that you cite this paper:

Aasted, C., Yücel, M., Cooper, R., Dubb, J., Tsuzuki, D., Becerra, L., Petkov, M., Borsook, D., Dan, I., Boas, D. (2015). Anatomical guidance for functional near-infrared spectroscopy: AtlasViewer tutorial Neurophotonics 2(2), 020801-020801. https://dx.doi.org/10.1117/1.NPh.2.2.020801

Homer Premium

A Homer Premium membership gives you access to past training courses, webinars, tutorials and additional functionality. You can access these materials under the Training tab.

Please register as a Homer Premium member to get access!


After 10 years of developing the Homer2 and AtlasViewer toolboxes (2009 to 2019), Homer2 is now being replaced by Homer3. AtlasViewer will continue to evolve along with Homer3. Homer2 will remain available online. It is unlikely that any more revisions will be made to Homer2.

Access to the open-source Homer2 and AtlasViewer software can be found at homer-fnirs.org.