< snip > > Decompose you image to RGB components. > In the new image, hide the red and green layers. > Add a layermask to the blue layer, initialized to a "Grayscale copy of > the layer". > Fill the blue layer with black. > > OPTIONAL: Most orthochromatic film would respond to some extent to > green, so repeat the last two steps on the green layer, make it > visible, and set its opacity to a relatively low value (0-30%).
This is very interesting and to a learner like me not too complicated. Perhaps I did not do it quite right but I have what appears to be an overlay of small black and white squares. How do I get rid of that? > > This method is a bit crude, but should provide something not entirely > unsuitable. A more accurate approach would probably entail applying > appropriate curves to the different color channels. Crude or not it looks very effective and a good starting point. Thank you. Norman _______________________________________________ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
