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I'd like to mask some clouds in Sentinel-2-Images with the python-fmask-library. As I'm not too experienced with Python and remote sensing, I have some questions. When I installed the library I automatically could execute the command-line-tools. The fmask_sentinel2stacked.py works from the command line when giving as input the .safe-directory, as described here: http://www.pythonfmask.org/en/latest/ But the library also does have some "python-specific" modules like fmask.py and config.py. In fmask.py the function doFmask() takes as input two instances of other classes. These instances contain information about, for example the thermal bands. As Sentinel-2 does not have thermal bands there is already the first confusion. Actually I just wanted to ask if someone already has experience in using this package and what are the differences in using the command line interface vs. the import of Python modules.

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  • Did you solve your question ( the one not in the title, I mean, it should have been named differently or split your two question I think). As far as I read on documentation, it is true that fmask counts over thermal bands, then given that s2 lacks of them, I suppose that they adapted the code to this fact, so I would expect it to be a bit less performant/accurate masking sentinel than landsat. But, who knows. Maybe inside they have found a tweak to explore extra red bands and higher resolution of sentinel 2 to overcome the thermal band difficulty. Hope this 2-cents help anyone interested in th – Juan C. Vasquez B. Nov 18 '20 at 14:03
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Make sure your .SAFE directory has the same structure as the official one. Note: it will be easier to run py-mask in Linux.

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