NEW VERSION now with option for split preview



Gmic -Contrast Swiss Mask by PhotoComiX, on Flickr

A very simple filter with not too much options or controls
..but maybe the first complete digital application of Contrast Mask ,as was used in Darkroom

....weird that all other Contrast Mask filters are limited to only lower the contrast, should be obvious that the same principle used to locally lower the contrast , may be well used also to locally increase the contrast.

Obviously a Contrast Mask is a a very simple way to manipolate the contrast but Smay be very effective

As default works as a Contrast Mask:

if the original is


DSC00138-S.jpg by { pranav }, on Flickr

Then the result would be


Gmic -Contrast Swiss Mask by PhotoComiX, on Flickr

But the same mask could be used to get the opposite effect
If you check the SKIP button ...then the effect will be the opposite of a traditional Contrast Mask

WHAT SKIP DOES

ORIGINAL


Untitled by jared, on Flickr

Default -NO "skip " option checked


Contrast Swiss Mask - NO skip by PhotoComiX, on Flickr

SKIP enabled


Contrast Swiss Mask -Skip by PhotoComiX, on Flickr

ORIGINAL


Nuclear Winter in Chernobyl by Stuck in Customs, on Flickr

SKIP enabled


Contrast Swiss Mask -Skip by PhotoComiX, on Flickr

#########HERE#THE#FILTER###############################

#@gimp Contrast Swiss Mask : gimp_contrast_swm2 , gimp_contrast_swm2_preview(0)
#@gimp : sep = separator ()
#@gimp : Blur the mask = float(2,0.5,10)
#@gimp : sep = separator ()
#@gimp : note = note ("Contrast Mask need the negative of the mask")
#@gimp : SKIP to use the mask to boost = bool(false)
#@gimp : note = note ("Uncheck for Contrast Mask,Check for Contrast Boost")
#@gimp : sep = separator ()
#@gimp : note = note("Merge the Mask")
#@gimp : Intensity = float (1,0,1)
#@gimp : sep = separator ()
#@gimp : Preview type = choice("Full","Forward horizontal","Forward vertical","Backward horizontal","Backward vertical")
#@gimp : sep = separator(), note = note("<small>Author : <i>PhotoComiX</i>. Last update : <i>2010/12/26</i>.</small>")
#@gimp : note = link("Filter explained here","http://www.gimpchat.com/viewtopic.php?f=9&t=864")

gimp_contrast_swm2 :
-repeat @# -l[$>] -split_opacity -l[0]
--luminance -to_rgb
-blur_xy[1] $1,$1
-if {$2==0} -negative[1] -elif {$2==1} -gimp_do_nothing -endif
-reverse[-2,-1] -gimp_compose_hardlight[-2,-1] $3
-endl -a c -endl -done

gimp_contrast_swm2_preview :

-gimp_split_preview "-gimp_contrast_swm2 ${1--2}",$-1

###########END#############


#################################################


Here the Controls


GMIC - Contrat Swiss Mask-updated by PhotoComiX, on Flickr



The first slider control the blurring of the mask,
default is a good starting point you may raise for large or very large images

Note well the Skip option allow to use the mask for the opposite effect, see below


Last slider control the intensity of the Effect,
More exactly allow to fade the effect over the original
( with Intensity 0 would be no any change )


ORIGINAL


Contrast swiss mask test - ORIGINAL by PhotoComiX, on Flickr

"SKIP" box checked (boost, opposite effect )


Contrast swiss mask test -boost by PhotoComiX, on Flickr

THE DEAFULT (mask)


Contrast swiss mask test - mask by PhotoComiX, on Flickr

Normally the contrast mask is used to locally decrease contrast to recover details in overcontrasted zones

Here the details on the right side (inside the blue box and on that side of the wall ) are burned or washed away beyond hope, so the effect of the the default setting are mainly visible on the lef side were is more to recover

ORIGINAL


Christmas Beer by thskyt, on Flickr

DEFAULT


Contrast swiss mask test - mask by PhotoComiX, on Flickr

LAST CONTROL is for the type of preview, as default is normal but you may get a horizontal or verical split preview , showing the before after as here


Gmic -Contrast Swiss Mask by PhotoComiX, on Flickr

Hey PC; haven't played with you Script yet, but I like to use Lumina Invert (a Script-fu I ran across a few years back) on a duplicate top layer and set that layer property to Overlay. Really oversaturates the colors as well as gives you the contrast mask effect.

This works splendidly, PC. Thanks!

i think is the same idea

As default it works as you will expect from a contrast mask, but will do the opposite checking a box

Here i used on a 3900x2600 photo with default

ORIGINAL


Hot Rod by dave_7, on Flickr

DEFAULT


Contrast Mask/Boost -Default test by PhotoComiX, on Flickr

PS maybe i will add a option for "Dark Sharpening"

New name
"Contrast Swiss Knife" ,now with Dark Sharpener included...

I like the name!

That's a bit ominous sounding. I love it!

No there are 2 too good competitors as Curve and level for the Contrast Swiss Knife honorificence

Better "Contrast Swiss Mask"

WOW this is very nice, can't wait to give it a try. Is this in the current version, or no, also when's the next release???

New version on first message
Often are the simplest things to work better ,so instead than add more options i simplified, and fixed a bug

@mikethedj4

To install extra gmic scripts you may just create a file called .gmic in C: Documents and Settings/ yourname/ application data and paste there the script you wish to add

Even more simple in linux...just add the .gmic file in your home directory

Oh, I've been waiting for it to show up in g'mic. Obviously I've been wrong.

maybe in the next version
Personaly i am happy that was not yet included because of that bug solved only now.

And i must fix some details alsoin the others i did
(hem..were fixed but seems i deleted the correct version and uploaded a draft
they do work well except for a option that also add a unrequested extra layer...good thing is that it is hidden behind the correct layer)

I feel a bit as in front of a fork, i can not hope to do much more without learn some basics of programming and get much more confidence with command line.
On the other side my only interest in programming is to create a few filter and tool that don't exist yet or not as i wish ;
there are not so much left ... and what left ( a good Kaleidoscope filter , similar to the Medhi PS plugin) looks very difficult

well ...before Easter i want a Eggify filter, but as now is not on top of my priority

So as now i plan just to perfect what i did till now ( already 5 ,Graphic Boost 1 & 2, Kool Draft, Realistic Painter , and this one )

Have a look to the first message

updated

see first message

I added both to my .gmic file PC, these are splendid man! =)



Thank you.

Glad you like Rod

NEW VERSION now with option for split preview as


Gmic -Contrast Swiss Mask by PhotoComiX, on Flickr

As default works as a Contrast Mask:

if the original is


DSC00138-S.jpg by { pranav }, on Flickr

Then the result would be


Gmic -Contrast Swiss Mask by PhotoComiX, on Flickr

But the same mask could be used to get the opposite effect
If you check the SKIP button ...then the effect will be the opposite of a traditional Contrast Mask

WHAT[b] SKIP DOES[/b]

ORIGINAL


Untitled by jared, on Flickr

Default -NO "skip " option checked


Contrast Swiss Mask - NO skip by PhotoComiX, on Flickr

SKIP enabled


Contrast Swiss Mask -Skip by PhotoComiX, on Flickr

ORIGINAL


Nuclear Winter in Chernobyl by Stuck in Customs, on Flickr

SKIP enabled


Contrast Swiss Mask -Skip by PhotoComiX, on Flickr

#########HERE#THE#FILTER###############################

#@gimp Contrast Swiss Mask : gimp_contrast_swm2 , gimp_contrast_swm2_preview(0)
#@gimp : sep = separator ()
#@gimp : Blur the mask = float(2,0.5,10)
#@gimp : sep = separator ()
#@gimp : note = note ("Contrast Mask need the negative of the mask")
#@gimp : SKIP to use the mask to boost = bool(false)
#@gimp : note = note ("Uncheck for Contrast Mask,Check for Contrast Boost")
#@gimp : sep = separator ()
#@gimp : note = note("Merge the Mask")
#@gimp : Intensity = float (1,0,1)
#@gimp : sep = separator ()
#@gimp : Preview type = choice("Full","Forward horizontal","Forward vertical","Backward horizontal","Backward vertical")
#@gimp : sep = separator(), note = note("<small>Author : <i>PhotoComiX</i>. Last update : <i>2010/12/26</i>.</small>")
#@gimp : note = link("Filter explained here","http://www.gimpchat.com/viewtopic.php?f=9&t=864")

gimp_contrast_swm2 :
-repeat @# -l[$>] -split_opacity -l[0]
--luminance -to_rgb
-blur_xy[1] $1,$1
-if {$2==0} -negative[1] -elif {$2==1} -gimp_do_nothing -endif
-reverse[-2,-1] -gimp_compose_hardlight[-2,-1] $3
-endl -a c -endl -done

gimp_contrast_swm2_preview :

-gimp_split_preview "-gimp_contrast_swm2 ${1--2}",$-1

###########END#######################

Oppss i messed up a bit with the image links, now is fixed

Fantastic PC! I grabbed it up.
Did you get any sleep yet? =)

i stumble upon something i want add a option for "Synbiotic Merging"
(I just inade up in my mind the the "Synbiotic Merging" you will not find on a wiki)


seems warking well manually

well different will be subtle but maybe cool compensate a bit possible colours shifts

NOW



Synbiotic Contrst Mask



Main differences in sky & the whitesh cloths