mroseto Posted September 9, 2010 Share Posted September 9, 2010 Hello all, I have an aerial map that has topo lines on it. I would like to remove everything but the brown topo lines. I am very new to Paint.net and I know how to replace colors but I only want to keep a certain color. Any help would be greatly appreciated. Mike Quote Link to comment Share on other sites More sharing options...
Guest PsychoHarmonic Posted September 9, 2010 Share Posted September 9, 2010 Seeing the picture would greatly help your chances of getting the effect you need. Quote Link to comment Share on other sites More sharing options...
mroseto Posted September 9, 2010 Author Share Posted September 9, 2010 Here is a sample of the map. Thanks for such a quick reply. Quote Link to comment Share on other sites More sharing options...
Guest PsychoHarmonic Posted September 9, 2010 Share Posted September 9, 2010 Looks like you would have to go over it very carefully in 400-800% zoom and erase everything but the lines....there might be a faster way but, I don't know of one because I am still a newb myself. Quote Link to comment Share on other sites More sharing options...
Rubrica Posted September 9, 2010 Share Posted September 9, 2010 Seeing as how the brown lines are aliased, this ought to be easy. First, select the magic wand tool, and set the tolerance to 0%. Also, make sure you are in global mode. The, click one of the brown lines (carefully, making sure not to click anything else. Now, press Ctrl+Shift+I. This will invert the selection. Finally, press Delete. Tada! Of course, being a newbie, some of that terminology might be unfamiliar to you, so just ask if you're not sure what I'm talking about. Quote Link to comment Share on other sites More sharing options...
Sarkut Posted September 9, 2010 Share Posted September 9, 2010 (edited) Another thing that you could try is: Use the Color Picker tool in the center of one of the wide topo lines. This sets the Primary Color to the topo line color. Use the Grim Color Reaper plugin to turn the topo lines transparent. Leave What Color? set to Primary Color. Adjust the sliders for the best result. http://a.imageshack.us/img687/61/topobcr01z.png Use the Silhouette Plus plugin to turn the pixels black. http://a.imageshack.us/img689/2479/topobcr02z.png Use the black layer as an Alpha Mask applied to the original map image. http://a.imageshack.us/img411/1596/topobcr03z.png Edited September 9, 2010 by Sarkut Quote Link to comment Share on other sites More sharing options...
Rubrica Posted September 9, 2010 Share Posted September 9, 2010 Isn't that a little... convoluted? Of course, it is a good practice to get into. Using good plugins, that is. Quote Link to comment Share on other sites More sharing options...
Sarkut Posted September 9, 2010 Share Posted September 9, 2010 You say "Convoluted" like it's a bad thing. jk I didn't get a good result with Magic Wand when I tried it. Maybe I didn't try hard enough. Quote Link to comment Share on other sites More sharing options...
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