Why should one try the method which _does_not_work_ as you said when there is the method which _works_?
There is no need for negative exposure if the histogram does not contain overexposed pixels. I've just made the experiment: 1. converted a RAW in darktable (git) to 16-bits tiff with usual tonal curve and correct exposure for highlights (ETTR). 2. as there is a bug in darktable tiff export both graphicsmagick and imagemagick refuse to take the image to increase its luminance. So I opened the image in 8-bits GIMP 2.7.2 and saved it as png. Then I added 2EV in GIMP with levels and saved the image with a new name (8- bits png too.) 3. enfuse --GrayProjector=l-star -o 1.png DSC07748.png DSC07748_01.png Here is a snapshot of original image http://bigserpent.users.photofile.ru/photo/bigserpent/150141165/167350384.jpg here is +2EV http://bigserpent.users.photofile.ru/photo/bigserpent/150141165/167350381.jpg and here is the result http://bigserpent.users.photofile.ru/photo/bigserpent/150141165/167350379.jpg As one can see it works even for 8-bits input. Note the histogram shows real dynamic range compression. I can provide original image. On 22 мар, 13:42, JohnG <[email protected]> wrote: > 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 > 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 [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/hugin-ptx
