RSS News FeedChanging colors to match another picture
Message-ID:<4a6afb17$0$9354$426a74cc@news.free.fr>
Subject:
Changing colors to match another picture.
Date:Sat, 25 Jul 2009 13:31:16 +0100
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 :-) Bonus points: how can I simulate the cracks in the painting? Is there a plugin for this? Thanks for any ideas. -- Bertrand
Message-ID:<48454f7c-b2cf-465b-9a78-0ad8065f6b67@y10g2000prg.googlegroups.com>
Subject:
Re: Changing colors to match another picture.
Date:Wed, 29 Jul 2009 09:20:34 +0100
On Jul 25, 5:31 am, Ofnuts <o.f.n.u....@la.poste.net> wrote: > 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).
Message-ID:<4a70259d$0$31433$426a74cc@news.free.fr>
Subject:
Re: Changing colors to match another picture.
Date:Wed, 29 Jul 2009 11:34:04 +0100
bucky3 wrote: > On Jul 25, 5:31 am, Ofnuts <o.f.n.u....@la.poste.net> wrote: >> I want to merge the two. Problem, Mona Lisa's skin is yellowish, and my >> daughter's is rosy. Is there a way to accurately transform the rosy into >> the required shade of yellow, akin to some kind of "yellow balance"? I'd >> like to avoid playing with color sliders a whole afternoon :-) > > It's a nightmare to try to change color temperature by using 3 RGB > sliders. I have found that the best free color temperature tool is > Picasa. It just has a single slider for color temperature. Then save/ > export Picasa to PNG and open with Gimp again to do your other work > (PNG avoids re-compression). Thanks for the tip. Unfortunately "yellow" is nowhere on the cursor range :-( I'm wondering if I can solve the problem by de-saturating the photo, and re-colorizing it using some average tint obtained from the painting. -- Bertrand
Message-ID:<0TWbm.134333$fS3.97870@newsfe05.ams2>
Subject:
Re: Changing colors to match another picture.
Date:Wed, 29 Jul 2009 13:02:04 +0100
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- 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
Message-ID:<nJqdnd7Zwf_O1-rXnZ2dnUVZ_jxi4p2d@giganews.com>
Subject:
Re: Changing colors to match another picture.
Date:Mon, 3 Aug 2009 21:36:35 +0100
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... Lou On Wed, 29 Jul 2009 14:45:59 +0200, Ofnuts wrote: > rich wrote: >> 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- >> 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. > > 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.
Message-ID:<4a86dd51$0$8023$426a74cc@news.free.fr>
Subject:
Re: Changing colors to match another picture.
Date:Sat, 15 Aug 2009 17:07:48 +0100
arkster wrote: > I simulated what you are talking about with a picture i downloaded of Liz > Taylor and another of the Mona Lisa. Here's one thing I did to get the > color right: > > 1. I cropped the two pictures so I just had the face. > 2. Using the Mona Lisa's face as the top layer of the image, I change the > layer's mode to Overlay. > 3. With the top layer selected I used the Gaussian Blur filter with the > Blur Radius set at [h]10 [v]10 and applied the filter several time until > I thought the color was right. > > I'd post the xcf file, but don't know if that's allowed here - I'm sort > of new and haven't read the faq yet. > > Anyway, something to try if you have the time... Back from vacations, and still some time to kill... thx for the hint. -- Bertrand
Message-ID:<CT3rm.143099$I35.40699@newsfe24.ams2>
Subject:
Re: Changing colors to match another picture.
Date:Sun, 13 Sep 2009 11:33:06 +0100
On Sun, 13 Sep 2009 02:12:26 -0700, lisztfr wrote: > 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