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GIMP TutorialsRevealing color of objects in GIMP (Showcase | Slideshow)

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Revealing color of objects in GIMP

Post#1 by tim » 02 Oct 2016, 16:01


How to reveal colors of some objects and make the rest black and white (color accenting an image).
For this tutorial, we'll be using a scaled down image from http://www.publicdomainpictures.net/vie ... ul-pencils
1. Open the image we want to color accent in GIMP.
color_reveal_01_open_image.png
color_reveal_01_open_image.png # (349.02 KiB) Viewed 1453 times (Watermarked | Thumbnail)
2. Right click the layer (in Layers window [Ctrl-L in Windows]) and select "New Layer".
color_reveal_02_new_layer.png
color_reveal_02_new_layer.png # (22.29 KiB) Viewed 1453 times (Watermarked | Thumbnail)
3. Select "Foreground color" and click "OK" to create New Layer filled with Black (This is assuming you still have black as foreground color and white as background color defaults when you opened up GIMP, if not quickly make it so before step 2. by clicking on the the little mini icon that looks like foreground and background color in the bottom left of where the foreground color and background colors are).
color_reveal_03_select_foreground.png
color_reveal_03_select_foreground.png # (13.88 KiB) Viewed 1453 times (Watermarked | Thumbnail)
4. Right click the newly created black filled layer, and select "Add Layer Mask".
color_reveal_04_add_layer_mask.png
color_reveal_04_add_layer_mask.png # (28.33 KiB) Viewed 1453 times (Watermarked | Thumbnail)
5. Select White(Full Opacity) and click "Add" to White Layer Mask.
color_reveal_05_select_white_mask.png
color_reveal_05_select_white_mask.png # (12.63 KiB) Viewed 1453 times (Watermarked | Thumbnail)
6. Click on "Mode" and then click "Color" to use this layer as color. (This layer could be filled with black or white, it'll make everything black and white as it is used as "Color" mode)
color_reveal_06_change_mode_to_color.png
color_reveal_06_change_mode_to_color.png # (20.16 KiB) Viewed 1453 times (Watermarked | Thumbnail)
7. You should still have the White mask selected. If not, click on the White Mask of the blacked filled layer.
8. Now use the "Paintbrush Tool" to start painting on the image to reveal color(s), because we have the Mask selected we're painting on the Mask. You can see that by painting black, it reveals colors. If you make a mistake why painting, just swap background and foreground color by click on the icon that looks like a curved double arrow that points to background and foreground color to quickly swap them and use white to paint over areas you want to turn back to black and white. So you can keep swapping back and forth between black and white to paint in colors or black and white until you're happy with the image.
color_reveal_07_paint_mask_black_with_paint_brush.png
color_reveal_07_paint_mask_black_with_paint_brush.png # (285.66 KiB) Viewed 1453 times (Watermarked | Thumbnail)
9. When done you File->Save As and .xcf which will save all your layers in GIMP's native format. Or export the result as an image of your desired format. Here's our example exported (File -> Export As) as .png.
color_reveal_08_exported_result.png
color_reveal_08_exported_result.png # (259.5 KiB) Viewed 1453 times (Watermarked | Thumbnail)
There is a similar tutorial that achieves the same effect but uses a different technique on gimpchat.com --> Very Basic Tutorial For Layer Masks
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Post#2 by Pat625 » 02 Oct 2016, 17:32


I will try this, Tin. As Lyle always says, "There's more that one way to skin a cat"!
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Post#3 by trandoductin » 02 Oct 2016, 18:06


Thanks for trying Pat ;)
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Post#4 by Issabella » 19 Jul 2017, 15:39


Nice to learn basic steps using Masks. Thank you Tin. :thumbsup:
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Daimiel_ice_RevealingColourOfObjects_Tin_Tut.jpg
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Post#5 by gnerd » 20 Jul 2017, 03:34


That was so fun and I learned something new :learned_something: Thank you Tin!!
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Post#6 by gnerd » 20 Jul 2017, 03:36


That is beautiful Issabella! Your work always looks magical!
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Post#7 by Pat625 » 20 Jul 2017, 16:37


I thought I posted a few, but I could not find them. Here are 2 now.
Tin Tran.Reveal Colors.Goldfinch.jpg
Tin Tran.Reveal Colors.Goldfinch.jpg # (62.2 KiB) Viewed 359 times (Watermarked | Thumbnail)
Tin Tran.Reveal Colors.Roses.jpg
Tin Tran.Reveal Colors.Roses.jpg # (217.21 KiB) Viewed 359 times (Watermarked | Thumbnail)
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