Hi, yes, I also can confirm that RT really excels in highlight reconstruction and is ahead of darktable (*). IMHO this has two aspects:
1) RT controls all this from one single panel. So there are only few clicks needed to get to the desired result. 2) Color reconstruction of blown-out highlights works very well. I think the first aspect is a question of UI philosophy. Highlight reconstruction involves different steps (dealing with clipped channels in pre-demosaic, negative exposure correction, color reconstruction) which in the case of darktable involves different modules. I think there are good arguments for our way of working. The second aspect is certainly something we need to work on. RT has a method called "color propagation" which seems to work better than our "color reconstruction" (which already has been a big step forward). I am not sure if we can get much better within the current "highlight recovery" module - maybe this is job for a separate module that works on demosaiced data. Ulrich (*) Driven by the example image provided by Istvan I have worked a bit on the shadows&highlights module. You can find my work in PR 866. This further helps in correcting blown out highlights but still lacks a convincing color recovery. Am 22.02.2015 um 19:28 schrieb Markus Jung: > Am 22.02.2015 um 19:18 schrieb KOVÁCS István: >> I've tried dcraw -E (just dump the raw pixels without >> demosaicing/highlight recovery etc.), then used a 2x2 convolution >> matrix in the Gimp to join the 2x2 R-G-B-R blocks into a single pixel. >> The result is at >> http://tech.kovacs-telekes.org/files/DSC_4684/DSC_4684-dcraw_-E.jpg - >> lots of highlight details are available, but I have been unable to get >> usable highlights from either darktable, digikam, dcraw (used -b 0.5 >> to reduce exposure by 1EV, and tried all highlight recovery modes of >> dcraw). >> >> Anyone? > > I tried to recover them with darktable, too. The best results have been > archived by using the new highlight recovery mode "reconstruct color" > but RawTherapee did a noticeable better job. > I guess darktable lacks some more enhanced highlight recovery algorithm. > Maybe one of the devs will notice your example and has some more ideas. > > Regards, > Markus > ------------------------------------------------------------------------------ Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=190641631&iu=/4140/ostg.clktrk _______________________________________________ Darktable-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/darktable-users
