input masks

[Lorrie Straka]

since you prefer this forum...

I was wondering if it would be difficult to slightly modify the requirements for the input masks. I believe (and I may be mistaken) that the required format is 0 for unmasked pixels and 1 for masked pixels. How about 0 for unmasked and accepting ANY other number for masked? In this way you'd be able to directly input maps from, say, SExtractor (segmentation or object images), which uses numbers >1 for multi-object fields...

Just a thought.

[Christian Herenz]

What about a little python-snippet like this, which will convert your masks accordingly.

from astropy.io import fits
hdu = fits.open('sextractor-segmentation-map.fits')
data = hdu[0].data
select = data >= 1
fits.writeto('mask-map.fits',data=select,header=hdu[0].header)

Untesteted - but something like this should convert a segmentation map into a mask that lsd-cat chews.

[Christian Herenz]

feel free to open again if you would like to see this as a feature of LSDCat - but for now I will close this, given that above snippet should somehow do the job.