On Mon, 2010-02-01 at 15:27 -0800, Rich Evans wrote: > Hello, Is this the right place to ask a question about special filters in > GIMP? If so, I'd love some advice on the following task: > > I have an RGB image that is basically a black background with many > colorful objects and white text. --- I'd like to invert the image so > that it is a white background with black text but a simple invert > inverts the colors in all the colored objects as well. Is there a > technique or tool to invert any part of the image that is only a shade > of grey? i.e. invert pixeils with a saturation of ~0 (if that is how > you say it). I could imagine a filter that does a simple RGB invert > for any pixel whose calculated RGB saturation value is below a set > threshold. Does this type of tool/script exist?
Simple. First create a duplicate of your layer. Then invert the colors on the lower layer and set the layer mode of the upper (unchanged) layer to "Colors". Sven _______________________________________________ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
