Sorry, one misstake: 0-140, not 140-255 ;) Am 08.06.2013 22:47, schrieb Markus Jung: > I have just found something which works quite fine for me, even if the > sky is fully blown out during processing: > > - Process for the dark regions of your image > - Activate the module "tonemapping" > - Set contrast compression to 1,0 and use blendif to limit the effect of > the module to the bright parts of the image (for example 140-255) > - Use mask blur (for example 2.5) to prevent halos and other ugly effects. > > Regards, > Markus > > Am 28.05.2013 23:42, schrieb Chris Siebenmann: >> A number of darktable processing steps can push unclipped RAW channels >> into overexposure under some circumstances (for example, the standard >> Nikon base curve not infrequently blows highlights out on me). As a >> relative beginner at darktable, I'm interested in people's views on the >> best and easiest way to recover the highlights in this case. >> >> I think that what I want at a conceptual level is to pull the >> highlights down (I assume inevitably reducing highlight contrast), >> but there may be something that gives a better visual look. Things >> I've tried, without universal success: >> >> * the Shadows and Highlights module often doesn't really reduce the >> blown highlights very much (or at all) and can give me an unnatural look >> (this may mean that I need to change the 'soften with' setting). >> >> * the Zone module also doesn't seem to be able to pull down the >> brightness of the blown highlights, although it can be used on things >> that aren't too bright. >> >> * Tone curves have defeated my ability to make good fine adjustments at >> the bright end of the curve without screwing up the rest of the image. >> I assume it's possible but I'm clearly not doing something right. >> (I've tried setting the linear preset to freeze most of the 'curve' >> and then monkey around only with the top end.) >> >> (I suspect that this is the right solution and what I want to do is >> develop some sort of 'highlight recovery' preset, but it's beyond my >> current darktable skill.) >> >> * the Levels module won't let me move the white point out to the right >> (which I think might have roughly the effect I want but I could be >> wrong about). >> >> Since I suspect that this sort of question always works better with an >> example, here's a sample D7100 NEF that exhibits the sort of 'blown in >> processing' effect that I'm talking about: >> >> http://www.cs.toronto.edu/~cks/tmp/darktable/DSC_1101.NEF >> >> (This picture has some genuinely clipped areas, but only a small >> number; many more blow out with the default Nikon tone curve.) >> >> (Note that I'm presenting this for illustrative purposes; I'm less >> interested in how to process this specific picture than in how to >> recover highlights in the general case that this picture is an example >> of.) >> >> Thanks in advance to anyone who has suggestions, guidance, etc. >> >> - cks >> >> ------------------------------------------------------------------------------ >> Introducing AppDynamics Lite, a free troubleshooting tool for Java/.NET >> Get 100% visibility into your production application - at no cost. >> Code-level diagnostics for performance bottlenecks with <2% overhead >> Download for free and get started troubleshooting in minutes. >> http://p.sf.net/sfu/appdyn_d2d_ap1 >> _______________________________________________ >> Darktable-users mailing list >> Darktable-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/darktable-users >> > > > ------------------------------------------------------------------------------ > How ServiceNow helps IT people transform IT departments: > 1. A cloud service to automate IT design, transition and operations > 2. Dashboards that offer high-level views of enterprise services > 3. A single system of record for all IT processes > http://p.sf.net/sfu/servicenow-d2d-j > _______________________________________________ > Darktable-users mailing list > Darktable-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/darktable-users >
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