Re: [Gimp-user] how to obtain the same adjustment in GIMP like this one in Photoshop Express
- From: Pat David <patdavid gmail com>
- To: Cristian Secară <liste secarica ro>, gimp-user-list gnome org
- Subject: Re: [Gimp-user] how to obtain the same adjustment in GIMP like this one in Photoshop Express
- Date: Fri, 07 Apr 2017 01:31:09 +0000
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 <liste 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>
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