Changing colors to match another picture.
Ofnuts
I have a painting (well, a jpeg of)(Mona Lisa)
I want to merge the two. Problem, Mona Lisa's skin is yellowish, and my
daughter's is rosy. Is there a way to accurately transform the rosy into
the required shade of yellow, akin to some kind of "yellow balance"? I'd
like to avoid playing with color sliders a whole afternoon :-)
Bonus points: how can I simulate the cracks in the painting? Is there a
plugin for this?
Thanks for any ideas.
--
Bertrand
bucky3
> I want to merge the two. Problem, Mona Lisa's skin is yellowish, and my
> daughter's is rosy. Is there a way to accurately transform the rosy into
> the required shade of yellow, akin to some kind of "yellow balance"? I'd
> like to avoid playing with color sliders a whole afternoon :-)
It's a nightmare to try to change color temperature by using 3 RGB
sliders. I have found that the best free color temperature tool is
Picasa. It just has a single slider for color temperature. Then save/
export Picasa to PNG and open with Gimp again to do your other work
(PNG avoids re-compression).
Ofnuts
Thanks for the tip. Unfortunately "yellow" is nowhere on the cursor
range :-( I'm wondering if I can solve the problem by de-saturating the
photo, and re-colorizing it using some average tint obtained from the
painting.
--
Bertrand
rich
> I have a portrait (my daughter)
>
> I have a painting (well, a jpeg of)(Mona Lisa)
>
> I want to merge the two. Problem, Mona Lisa's skin is yellowish, and my
> daughter's is rosy. Is there a way to accurately transform the rosy into
> the required shade of yellow, akin to some kind of "yellow balance"? I'd
> like to avoid playing with color sliders a whole afternoon :-)
You can use the color picker tool on the Mona Lisa image. Hold the shift
key down while picking and a color picker information window will pop-up.
This will give the RGB percentages.
These percentages can be used in the color balance dialog If you are
trying to change the skin tones globally, I would say don't. Select an
area, say the face, using the free select tool and apply the Mona Lisa
values in the color balance, repeat for other areas. The color balance
keeps the settings last used in the presets, click on the arrows next to
this box and select, so you should not have to enter the RGB values more
than once.
>
> Bonus points: how can I simulate the cracks in the painting? Is there a
> plugin for this?
Dont know of a dedicated plugin but:
You can do a crack effect using the iccii-texturize script from The FX-
foundry set.
http://gimpfx-foundry.sourceforge.net/
Unpack and add iccii-texturize.scr to you local scripts folder
This will apply a gimp texture over the image. Problem is, all the gimp
textures are small tiles, round the 100x100 size, so you will have to
make your own.
If you are a good artist you can draw the crack yourself, otherwise
Get a set of crack brushes - there is a good one here
http://www.obsidiandawn.com/cracks-photoshop-gimp-brushes
This is a PS .abr brush but works fine in gimp. Unpack, its only one
file, and add to your local brushes folder.
To use it: Open a new image with white background. The size depends very
much on the image you apply texturizer to, but try 1000x1000. On the
white background, using a crack brush, paint a big crack in the centre of
the canvas. Save it as something.pat (adding the .pat is important) and
copy the resulting file to your local patterns folder. Restart Gimp.
Over to your portrait image, go to the FX-foundry menu and choose
Texturizer from Selection Effects. In the texturizer dialog, go to the
pattern you created - the size is a give-away and select. Click OK and
this will be applied over the area of the image. It might be too big/too
small/ too regular. A bit of experimentation required. If the pattern is
too regular, make a series of big rectangular selections and apply
texturizer to the selection.
--
rich
Ofnuts
Plenty of things to try... already tried the available cracks brushes
but the paint cracks have their own specific shape. However your post
got me in the idea that I can attempt to extract the cracks from a
suitable area of the painting, and use them to make a brush.
Thx for your input.
--
Bertrand
arkster
Taylor and another of the Mona Lisa. Here's one thing I did to get the
color right:
1. I cropped the two pictures so I just had the face.
2. Using the Mona Lisa's face as the top layer of the image, I change the
layer's mode to Overlay.
3. With the top layer selected I used the Gaussian Blur filter with the
Blur Radius set at [h]10 [v]10 and applied the filter several time until
I thought the color was right.
I'd post the xcf file, but don't know if that's allowed here - I'm sort
of new and haven't read the faq yet.
Anyway, something to try if you have the time...
Lou
Ofnuts
Follow-up: extracting the cracks and using them as a brush did work
quite well.
--
Bertrand
Ofnuts
> I simulated what you are talking about with a picture i downloaded of Liz
> Taylor and another of the Mona Lisa. Here's one thing I did to get the
> color right:
>
> 1. I cropped the two pictures so I just had the face.
> 2. Using the Mona Lisa's face as the top layer of the image, I change the
> layer's mode to Overlay.
> 3. With the top layer selected I used the Gaussian Blur filter with the
> Blur Radius set at [h]10 [v]10 and applied the filter several time until
> I thought the color was right.
>
> I'd post the xcf file, but don't know if that's allowed here - I'm sort
> of new and haven't read the faq yet.
>
> Anyway, something to try if you have the time...
Back from vacations, and still some time to kill... thx for the hint.
--
Bertrand
lisztfr
> On Sat, 25 Jul 2009 14:31:16 +0200, Ofnuts wrote:
> > I have a portrait (my daughter)
>
> > I have a painting (well, a jpeg of)(Mona Lisa)
>
> > I want to merge the two. Problem, Mona Lisa's skin is yellowish, and my
> > daughter's is rosy. Is there a way to accurately transform the rosy into
> > the required shade of yellow, akin to some kind of "yellow balance"? I'd
> > like to avoid playing with color sliders a whole afternoon :-)
>
> You can use the color picker tool on the Mona Lisa image. Hold the shift
> key down while picking and a color picker information window will pop-up.
> This will give the RGB percentages.
>
> These percentages can be used in the color balance dialog If you are
> trying to change the skin tones globally, I would say don't. Select an
> area, say the face, using the free select tool and apply the Mona Lisa
> values in the color balance, repeat for other areas. The color balance
> keeps the settings last used in the presets, click on the arrows next to
> this box and select, so you should not have to enter the RGB values more
> than once.
>
>
>
> > Bonus points: how can I simulate the cracks in the painting? Is there a
> > plugin for this?
>
> Dont know of a dedicated plugin but:
>
> You can do a crack effect using the iccii-texturize script from The FX-
>
> Unpack and add iccii-texturize.scr to you local scripts folder
>
> This will apply a gimp texture over the image. Problem is, all the gimp
> textures are small tiles, round the 100x100 size, so you will have to
> make your own.
>
> If you are a good artist you can draw the crack yourself, otherwise
>
> This is a PS .abr brush but works fine in gimp. Unpack, its only one
> file, and add to your local brushes folder.
>
>
> --
> rich
If i remember, .abr works fine in newer versions of Gimp (like normal
peoples use) but not in previous one (like 2.2, like mine)
L
rich
> On 29 juil, 14:02, rich <r...@nohome.com> wrote:
>> On Sat, 25 Jul 2009 14:31:16 +0200, Ofnuts wrote:
>> > I have a portrait (my daughter)
>>
>> herehttp://www.obsidiandawn.com/cracks-photoshop-gimp-brushes
>>
>> This is a PS .abr brush but works fine in gimp. Unpack, its only one
>> file, and add to your local brushes folder.
>>
>>
>
>> --
>> rich
>
> If i remember, .abr works fine in newer versions of Gimp (like normal
> peoples use) but not in previous one (like 2.2, like mine)
>
> L
Yes, support for .abr came in with gimp 2.4
Try abrview, it views PS brush set and dumps each brush to a
separate .png file.
http://www.easyelements.com/abrview.html
From memory you use win98? so maybe no good for you, but its a small file
and worth a try.
--
rich