I would like to be able to produce a black and white negative image from an ordinary colour image. The effect I would like to produce would be to imitate what one would get if you took a colour, positive transparency and made a contact print on to either orthographic or lithographic film. Thus, blue would be black and red would be clear and transparent. Have you any suggestions how to approach this using the Gimp, please.
Norman _______________________________________________ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
