If you're looking to isolate adjustments to a particular set of tones (shadows, mids, highlights) then you might want to check out luminosity masks:
https://www.gimp.org/tutorials/Luminosity_Masks/ On Thu, Apr 6, 2017 at 6:26 PM Cristian Secară <li...@secarica.ro> wrote: > I played a bit with Adobe Photoshop Express in Windows phone and found > a useful adjustment that increases the gain in deep shadow portions, > while at the same time keeps *untouched* the already bright areas > (above a certain predefined level). > > Here is a sample: > (original image) > http://www.secarica.ro/temp/test_808_original.jpg > (shadow increase to 100%) > http://www.secarica.ro/temp/test_808_photoshop_express_shadow_100.jpg > For the above image, the processing time when saving is about 11 > seconds (on a 1.2GHz quad core Windows phone). > > The application's adjustment looks like this > http://www.secarica.ro/temp/wp_ss_20170407_0003.png > > I tried in GIMP various filters, effects, scripts, curves, fake HDR > etc. but with either I played with, there was always a slight change > also in the bright portions of the image. > > What adjustment can be used to obtain the exact same result by using > GIMP ? > > Here is another sample: > (original image - filename nokia_lumia_1020_10.jpg on this page > http://www.photographyblog.com/previews/nokia_lumia_1020_photos/ ) > (shadow increase to 100%) > http://www.secarica.ro/temp/test_1020_photoshop_express_shadow_100.jpg > > Thank you, > Cristi > > -- > Cristian Secară > http://www.secărică.ro <http://www.xn--secric-k0ad.ro> > _______________________________________________ > gimp-user-list mailing list > List address: gimp-user-list@gnome.org > List membership: https://mail.gnome.org/mailman/listinfo/gimp-user-list > List archives: https://mail.gnome.org/archives/gimp-user-list -- https://patdavid.net GPG: 66D1 7CA6 8088 4874 946D 18BD 67C7 6219 89E9 57AC _______________________________________________ gimp-user-list mailing list List address: gimp-user-list@gnome.org List membership: https://mail.gnome.org/mailman/listinfo/gimp-user-list List archives: https://mail.gnome.org/archives/gimp-user-list
