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May 1997
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1997.05.21 10:09 "Re: unknown field with tag 34377 (0x8649)", by John Cupitt
Helge Blischke <H.Blischke@srz-berlin.de> wrote: >the simplest method is: R = 255 - C; G = 255 - M; B = 255 - Y; ignore >K. Of course, the resulting RGB colors might not be axact; there are It depends on the pcr setting used by the separator, but this will probably give rather washed-out dark areas. Try subtracting K from each of RGB as well, ie. R = (255 - C) - K; ... etc, for a slightly better result. And clip against zero. John -- John Cupitt, john@giorgio.hart.bbk.ac.uk, +44 (0)171 930 2108 VASARI Lab, The National Gallery, Trafalgar Square, London, WC2N 5DN