Re: [Gimp-user] Blueprint Style Effects?

[Elle Stone <ellestone ninedegreesbelow com>]

On 11/07/2014 03:34 PM, Garyfx wrote:
> > You mean just exchanging colors?
> Well, I may have not been as articulate as I could have.  I want to take JPG
> images of trailers and turn them into line schematics or outlines.  I want just
> the line drawing or frame of the trailers like the images I attached in my
> original message.
>
> And... a simple grey background is sufficient.
>
> Thanks

This PhotoShop-specific link explains how to use divide blend mode to 
make a line drawing; the technique is the same when using GIMP:

http://blog.advancedphotoshop.co.uk/tutorials/how-to-use-the-divide-and-subtract-blending-modes-in-photoshop-cs5/