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Post by cowboyleland on May 22, 2013 18:26:00 GMT -9
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Post by hobbeskind on May 23, 2013 3:02:36 GMT -9
In what way is this different from Photoshop's saturation filter?. As far as I can see it is a fairly complicated way of reducing an RGB picture to Grayscale/ or isn't it?
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Post by hackbarth on May 23, 2013 4:06:28 GMT -9
The difference is that the result isn't grayscale. It has substituted the colors for transparency. In this way you can put color on a layer behind the image layer, and it will show up as the image was originally colored with that color. I'll do one better than putting the link on a more easy to find topic, I'll translate the tutorial in this topic the same way I did with Coloring figures in GIMP and Recoloring / Texturing models
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Post by cowboyleland on May 23, 2013 4:07:12 GMT -9
edit: Hackbarth and I were replying at the same time Well, GIMP is free, those of us who don't want to buy photoshop can't use a photoshop filter . No other desaturation technique I've tried in GIMP gives you an image that is quite as transparent. This seems to keep the highlights and shadows without otherwise distorting the "base" hue I apply underneath. One note: I guess I could save a few keystrokes if the order of setting color to transparency was: ffff00 ff0000 ff00ff 0000ff 00ffff 00ff00 But really converting to transparency is already faster and easier than the actual re-colour itself, and I don't need to be careful to colour inside the lines. Oh, and once you've done and saved one, if you want a bunch you can go to color/map/exchange and have a whole new fig in one fell swoop (some touch up required)
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Post by hackbarth on May 23, 2013 4:08:43 GMT -9
Now, let's prepare a mini to be recolored. The first step, as always, is to open the figure in GIMP, if it's a PDF, open it at 300dpi or so.
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Post by hackbarth on May 23, 2013 4:09:55 GMT -9
Now go to Layer> Transparency> Color to Alpha and we will start removing the colors: Attachments:
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Post by hackbarth on May 23, 2013 4:11:56 GMT -9
The trick is to remove all color components of the image, click the color to be removed and change to FF0000 (red). Attachments:
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Post by hackbarth on May 23, 2013 4:12:27 GMT -9
Repeat Color to Alpha to 00FF00 (green), 0000FF (blue), FFFF00 (yellow), 00FFFF (Cyan), and FF00FF (magenta). Attachments:
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Post by hackbarth on May 23, 2013 4:14:21 GMT -9
Done! Any color in the figure was removed and made transparent. Now the figure is ready to receive new colors. Attachments:
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Post by hackbarth on May 23, 2013 4:16:36 GMT -9
Recolor is easy. Just create a new layer under the layer of the figure and paint the colors in the bottom layer . The top layer has the lineart of Fig. See how bottom layer got, the colors are simply thrown where you want them to appear, all of the tracing, shading, textures was preserved in the upper layer. only the colors need to be inserted. Attachments:
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Post by hackbarth on May 23, 2013 4:17:21 GMT -9
Minimal work, stunning results! Attachments:
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Post by hobbeskind on May 23, 2013 22:56:18 GMT -9
Right I get it, I think Will have a try
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