I was using the Screen Transfer Function in PixInsight yesterday, applying it to the histogram and then saving the image as a 16bit TIFF file to process further in Adobe Photoshop.
For some reason, when doing the same thing today, when I save the image from PixInsight I get a massively underexposed TIFF file, as if the STF didn't apply to the image properly.
The only thing I can't work out is why this is happening as I'm doing nothing different to what I did yesterday.
The first attached screenshot shows what the image looks like in PixInsight after I've applied the STF to the histogram. The second screenshot shows what the image looks like once I've saved it as a 16bit TIFF.
I've been playing around with some of the export settings and noticed that if i tick the 'ICC Profile' box when exporting from PixInsight the exported file is properly exposed. The issue then re-appears when I import into Photoshop as it does not recognise the ICC Profile. As soon as i finish processing in Photoshop and try to export as a TIFF file I end up with an under exposed image again. If I export as a JPG I don't get the same issue so it appears as though my issue is specifically with using TIFF files.
Edited by Gr4h4m, 07 July 2020 - 02:27 AM.