May I suggest an experiment ? 1. Take a RAW file and convert it -- so that the whole DR is included -- into a single TIF . ( In order to get the whole DR into the TIF, you will have to flatten the global contrast. )
2. From this TIF, manually create a +2EV TIF and a -2EV TIF, so you now have a set of 3 TIFs. ( This step - as I understand it - is what you want Hugin/Enfuse to do internally ). 3. Run the 3 TIFs through Enfuse and eyeball the results. My guess is you will be disappointed by the results, due to the unavoidable loss of contrast and saturation in step 1. :-J On Mar 22, 9:15 am, Alexander Rabtchevich <alexander.v.rabtchev...@gmail.com> wrote: > Kay is right. It's all about dynamic range compression, which is made > at tonemapping, not about flat tiffs. > > Our vision changes sensitivity within a scene so the shadows and > midtones are perceived bright enough even for a scene with high > dynamic range. That's not true for a linear camera sensor even after > application of global camera non-linear tonal curve. > If there is a highlight area within a frame like a sky or sun > reflections the difference in luminance between highlights and shadows > becomes 2 stops (4 times) and more. Application of global non-linear > tonal curve to increase luminance of shadows and midtones leads to > visual compression of highlights and often ruins skintones. The only > good solution is a masked approach. > > When enfuse takes two tiffs (or even jpgs) from one RAW with normally > exposed highlights (and dark shadows and midtones) and normally > exposed shadows and midtones, but overexposed highlights, it produces > naturally looking image with good highlights, shadows and midtones. Of > cause, it can require some adjustment in weight settings or exposure > compensation of initial images, but the result can look very much > similar to the picture one saw when he was taking the snapshot. I can > provide the original RAW, intermediate and resulting tiffs to prove > the concept. > > With respect, > Alexander Rabtchevich -- You received this message because you are subscribed to the Google Groups "Hugin and other free panoramic software" group. A list of frequently asked questions is available at: http://wiki.panotools.org/Hugin_FAQ To post to this group, send email to hugin-ptx@googlegroups.com To unsubscribe from this group, send email to hugin-ptx+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/hugin-ptx
