retinex

dinasset · **Posted:** Sun Jun 22, 2014 6:11 am **(#21)**

Molly, I did!
Tried, with detail put all to max values.
Quite a good result, thanks GC

Attachment:

Forest9_GC_ToneEnhance.png [ 1.24 MiB | Viewed 1476 times ]

garagecoder · **Posted:** Sun Jun 22, 2014 6:24 am **(#22)**

You can focus on only the very darkest areas by moving the "Centre" slider closer to zero (and keep the highlight detail low), if the result is too harsh the smooth slider can help. There are of course limits depending on your input image :yup

molly · **Joined:** Apr 07, 2010 **Posts:** 14182

It is amazing what you can do. I know I got carried away with the sliders but with practice, I could make it much better.
Yours is really nice dinasset.

saulgoode · **Posted:** Sun Jun 22, 2014 7:11 am **(#24)**

The Mantiuk and Fattal GEGL operations are in the same family of filters as Retinex and might be worth experimenting with.

molly · **Joined:** Apr 07, 2010 **Posts:** 14182

I really like that saul, where do I find that filter, it isn't under colors.
I love the fattal one.

dinasset · **Posted:** Sun Jun 22, 2014 7:36 am **(#26)**

good info, saulgoode
can those "operations" be called/referenced in a script?

dinasset · **Posted:** Sun Jun 22, 2014 7:38 am **(#27)**

Molly,
it's under Tools

molly · **Joined:** Apr 07, 2010 **Posts:** 14182

Wow, thanks dinasset.
As I mentioned before, many times. I think it would take a life time to really learn all there is know, and find them in Gimp.
This is why I never venture out to other apps. If it isn't in Gimp, then it doesn't exist.
This forum also has many helpful members that are willing to share what they know, and glad to do it.

saulgoode · **Posted:** Sun Jun 22, 2014 8:33 am **(#29)**

dinasset wrote:

good info, saulgoode
can those "operations" be called/referenced in a script?

Not yet. There was a project that allowed Python plug-ins to employ GEGL ops but it hasn't been updated in two years; however, if one were able to get it working then a script could use the 'python-fu-eval' procedure to invoke it.

Issabella · **Posted:** Sun Jun 22, 2014 9:27 am **(#30)**

I'm amazed at how much you all who know about scripts and how much research you do about it. I just wanted to thank who are helping to get a fantastic script for your great effort. :clap

Gracias, Saulgoode, garagecoder and Dinasset. :tyspin

dinasset · **Posted:** Sun Jun 22, 2014 1:24 pm **(#31)**

I did some more experiments with GC filter (G'MIC - Testing - Garagecoder - Tone enhance).
Outcomes are -imo- very very good.
I want to show them to you:
- Orig.zip folder contains 7 images taken from Windows 7 Background Themes
- GC.zip folder contains the same images after my use of GC filter
After these nice results I put that filter on my G'MIC Faves

Thanks GC, for this filter!

Attachment:

Orig.zip [1.95 MiB]
Downloaded 82 times

Attachment:

GC.zip [3.43 MiB]
Downloaded 87 times

Molly, here you have the preview!

molly · **Joined:** Apr 07, 2010 **Posts:** 14182

Thank you Dinasset, Yes previews do help a lot.

Marcello · **Joined:** Mar 10, 2014 **Posts:** 845

Tone enchance test: great result!
Thank you Garagecoder

ORIGINAL

AFTER USE TONE ENCHANCE