Hi, The scenario - have an inkjet printer which regularly runs out of black ink, but still has plenty of colour ink. I would like to change black to dark blue or whatever, so I can print eg. a concert ticket with a black barcode, which will still scan fine at the venue entrance.
On SGI in Days of Olde, this would be " repcol ticket.rgb 0 0 0 0 0 20 10 " or similar, ie. replace all pixels within 10 units (out of 255) of black with dark blue. Good old Paul Haeberli and his gfx tools. Appreciate assistance in doing this in Gimp - 2.6.7 on Mac with Snow Leopard (10.6). Or indeed a command line tool of any kind, I need this little trick quite a bit. ATdhvaannkcse ! Greg E
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