I did a bit of experimenting in an attempt to achieve the 'red-filter' look (black sky) and found some reasonable solution in using the 'channel mixer'. If you set the destination to 'gray' in the module, pull the red and green sliders to +1 approximately and then drop the blue slider to the area of -1 ... then a reasonable red filter on pan film effect is obtained.
David On 14-03-03 04:07 PM, David Vincent-Jones wrote: > Using the Monochrome module I note that there is only an very minimal > darkening of the sky using the 'red filter' preset (certainly nothing > like the expected effect that would be found with film). Even when the > target circle is reduced to its smallest size and moved to the corner of > the red quadrant the effect still is lacking, quite significantly. > > Possibly this module needs to be reevaluated. Monochrome is an important > part of many photographers arsenal. Yes there are other ways to produce > the monochrome effect but the Monochrome module should be the primary > option. > > David > > > On 14-02-14 01:36 AM, Thomas Paris wrote: >> Hi Philipp, >> >> On Thu Feb 13 at 22:35 (+0100), Philipp Bender wrote: >>> [...] >>> I have an image with a nice blue sky, and I want to turn the sky very >>> dark and get a nice contrast to the clouds (it's a black-and-white >>> image). [...] >> Traditionally (before digital), black skies were the result of the use >> of a red filter. In theory you should be able to duplicate this with >> either the monochrome or channel mixer filters. >> >> HTH, >> Thomas > > ------------------------------------------------------------------------------ > Subversion Kills Productivity. Get off Subversion & Make the Move to Perforce. > With Perforce, you get hassle-free workflows. Merge that actually works. > Faster operations. Version large binaries. Built-in WAN optimization and the > freedom to use Git, Perforce or both. Make the move to Perforce. > http://pubads.g.doubleclick.net/gampad/clk?id=122218951&iu=/4140/ostg.clktrk > _______________________________________________ > Darktable-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/darktable-users > ------------------------------------------------------------------------------ Subversion Kills Productivity. Get off Subversion & Make the Move to Perforce. With Perforce, you get hassle-free workflows. Merge that actually works. Faster operations. Version large binaries. Built-in WAN optimization and the freedom to use Git, Perforce or both. Make the move to Perforce. http://pubads.g.doubleclick.net/gampad/clk?id=122218951&iu=/4140/ostg.clktrk _______________________________________________ Darktable-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/darktable-users
