Pencil Shade script Rel8 [for 2.10 & gmic-qt made faster for wisps]

Akros · **Joined:** Jan 10, 2013 **Posts:** 863

Rod wrote:

Graechan here is another use for your script.

[ [url]Image[/url] ]
[ [url]Image[/url] ]

Rod that's interesting!
This same effect is achieved by desaturate the image and apply a mask to specify the areas to be colored. Pretty simple.

So I decided to compare the results using the two techniques, and the same mask.
By Pencil Shade - Rod's Tecnique

By Dessaturation Tecnique

The large difference seems to be the opacity (lower contrast). But it is very subtle.

I'm still using version Rel1, has not given any error in my Gimp.

Rod · **Joined:** May 16, 2010 **Posts:** 16168

Graechan wrote:

Nice result Rod, what type of mask did you add to the 'line layer'

White - full opacity.

Graechan · **Posted:** Sun Jul 14, 2013 3:28 am **(#43)**

Akros the 'Pencil Shade script' initially desaturates the layers before adjusting them

Rod thanks for the info

GnuTux · **Posted:** Sun Jul 14, 2013 12:35 pm **(#44)**

PhotoComix wrote:

GnuTux wrote:

maybe Graechan would be willing to add this effect to the script, as an option. :cool

bit difficult :
that cool effect you all get may be difficult to hardcode, because it will change much depending on image size (with same setting a very dramatic and strong effect on relatively little images, MUCH softer if very large .

So i guess or the script should call GMIC> anisotropic mode in iterative mode , or should be advised that also the image size will influence much the effect

Well, I suppose that could be said for lots of different filters. Some filters just work better with certain kinds of images, or certain size images, than others. For proof of concept, I was able to implement the effect with just a few lines of code added to the script. The effect looks good, at least with the photos I tested out. There really isn't many parameters to change in the filter and those options could be easily added, if needed.

Code: Select all

;====================================================
; Add Effect to Pencil Script (GnuTux)
;=====================================================
        (gimp-layer-set-mode lineLayer NORMAL-MODE)
        (gimp-layer-set-opacity lineLayer 100)
        (gimp-image-raise-layer image shadeLayer)
        (gimp-layer-set-mode shadeLayer DIFFERENCE-MODE)
        (set! lineLayer (car (gimp-image-merge-down image shadeLayer EXPAND-AS-NECESSARY)))
        (gimp-colorize lineLayer 187 70 -15) ; +7 to blue, +20 sat, -15 lightness 

        ; Call GMIC
        (plug-in-gmic
                        1 ; Mode: interacive=0, non-interactive=1
                    image ; Input Image
                lineLayer ; Inout Drawable (not used)
                        1 ; Input layers mode, when non-interactive (see below)
                          ; 0=none, 1=active, 2=all, 3=active & below
                          ; 4=active & above, 5=all visibles, 6=all invisibles
                          ; 7=all visibles (decr.), 8=all invisibles (decr.), 9=all (decr.)
        ; GMIC Command String (Run GIMP from terminal set GMIC to verbose to see command string)
                   (string-append
                   "-v - "                ; Required to work properly in Script-fu 
                   "-gimp_dreamsmooth "   ; GMIC filter name
                   "2,1,1,0.8,0,0.8,0"    ; GMIC filter arguments
                   )
    );end GMIC call
;
;=========================================================
;

Classic Car

Golden Nugget

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

Cool, I love the top one.

Rod · **Joined:** May 16, 2010 **Posts:** 16168

Nicely done Tux.

Graechan · **Posted:** Mon Jul 15, 2013 3:14 am **(#47)**

GnuTux I have created a script called Whisps (for want of a better name) using the parameters you posted
(thank you for the assist 'doc has me taking it easy till I brush off this head cold')

Rod · **Joined:** May 16, 2010 **Posts:** 16168

Graechan wrote:

GnuTux I have created a script called Whisps (for want of a better name) using the parameters you posted
(thank you for the assist 'doc has me taking it easy till I brush off this head cold')

Take it easy Graechan and get well soon.

Try chicken soup, it's the best for head colds. Also try some pine needle tea.

GnuTux · **Posted:** Tue Jul 16, 2013 1:10 am **(#49)**

Graechan, hope you start feeling better soon!

Wisps (without the h) is a great name for the effect. :bigthup

Graechan · **Posted:** Tue Jul 16, 2013 2:48 am **(#50)**

Rel5 has just been added containing the additional Wisps Script, see initial post(remember the GMIC Filter used by wisps takes time

once again thank you GnuTux for the assistance

GnuTux · **Posted:** Tue Jul 16, 2013 12:20 pm **(#51)**

Graechan wrote:

Rel5 has just been added containing the additional Wisps Script, see initial post(remember the GMIC Filter used by wisps takes time

Thanks, Graechan. Looks great!

If you get the chance, it would be nice to be able to select the wisp color and to be able to set the GMIC iterations.

Rod · **Joined:** May 16, 2010 **Posts:** 16168

has anyone tried this with a burn overlay mode on top of the original image. Wow!

Nice Graechan. Thanks for the new wisps filter.

Rod · **Joined:** May 16, 2010 **Posts:** 16168

First run wisps-keep all layers
change mode to grain extract layer mode (bottom layer is original image) , flatten the layer (duplicate) , and run pencil-shade with defaults on the top layer.

Now
Place line layer in center and set to grain merge 100 percent opacity and set the shade layer on top to color mode. 100 percent opacity also.

GnuTux · **Posted:** Tue Jul 16, 2013 2:02 pm **(#54)**

Great effect, Rod! I also like placing the original on top and selecting color mode.

Rod · **Joined:** May 16, 2010 **Posts:** 16168

Nice Tux!

Here is the same thing but multiply mode for center layer.

Then my color layer combo (secret ingredient cinematic effect).

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

Thank you guys. Gosh you keep a person busy just replacing these scripts. :teeth

Akros · **Joined:** Jan 10, 2013 **Posts:** 863

molly wrote:

Thank you guys. Gosh you keep a person busy just replacing these scripts. :teeth

I'm still with Rel1!
But now I'm convinced ... I will update!

Graechan · **Posted:** Tue Jul 16, 2013 9:53 pm **(#58)**

Nice results GnuTux and Rod, sorry about the updates Molly and Akros please update as rel1 was just a test of theory, Only 1 more day of rest and then back to the garden (while the ground is soft :rofl

)

Graechan · **Posted:** Tue Jul 16, 2013 10:38 pm **(#59)**

Please Note! 2 Important changes were made in Gmic 1-5-6-1 to the way the plugin works when used in a script

1/ the Gmic output mode is automatically set to 'In place (default)' for the duration of the script.
This will give the script writer more control

2/ The progress bar Text will display what is happening within Gmic, instead of the confusing
"Updating Filters"

I would like to thank David for Implementing these changes so quickly :hi5

Oregonian · **Posted:** Tue Jul 16, 2013 10:59 pm **(#60)**

.
.
What fun!