WheeQo.web.id

I will show how to convert from full color image to a 3 color separation in GIMP. After learning the tutorial you can make 4, 5, and so on; color separation. With a few color it is also easier to vectorized it, such as with Inkscape.
The 3 colors are: white, gray, and black.
Before:

After:

The Steps

1. Duplicate into 3 layer. Rename it each one with white, gray, and black.

2. We will start with the gray layer. Select gray layer and hide the other layer. Go to menu Colors -> Threshold….

3. Fill the left value 85 and the right value 170. Click OK. See image below.

Click to see larger image.
Now all midtone color will be seen in white color.

4. Now we must delete the black color and change the white color into gray. With Select by Color Tool click on black color area.

5. With the black color selected, go to menu Layer -> Transparency -> Add Alpha Channel. Then delete. The black color will be deleted.

6. Right click on gray layer -> Alpha to Selection.

Click to see larger image.
All the white color will be selected.

7. Change the Foreground color with gray. Then go to menu Edit -> Fill with FG Color.

Click to see larger image.

8. The white color area will be changed to gray color.

9. Now select white layer and hide the other layer. Go to menu Colors -> Threshold…. Fill the left value 170 and the right value 255. Click OK. See image below.

Click to see larger image.
Now all light color will be seen in white color.

10. Since the light color already in white, you only have to delete the black color. The process just like the gray layer.

11. Now select black layer and hide the other layer. Go to menu Colors -> Threshold…. Fill the left value 0 and the right value 85. Click OK. See image below.

Click to see larger image.
Now all dark color will be seen in white color.

12. Now you must delete the black color and change the white color into black color. The process just like the gray layer.

13. Last step, unhide all layer except the original layer. Don’t forget to save it in GIMP format (.xcf)

Related posts:

1. Inkscape Tutorial: Create Letterpress Text Effect This effect is become famous nowadays especially in web design....
2. Transparent Image in Office 2007 White Background on Image When we inserting image, except png...
3. Tips Insert Image in Joomla! There are many ways to insert image(s) in Joomla!. The...
4. AutoCAD Tips: Use LAYISO to Quickly Show Layers You Only Need LAYISO command isolates the layer of selected objects so that...
5. Tutorial CorelDRAW: Export Object with Transparent Background The case: I’ve create objects with CorelDRAW like this: see...

Related posts brought to you by Yet Another Related Posts Plugin.