|TIFF and LibTiff Mailing List Archive|
LibTiff Mailing List
2006.09.15 15:49 "Re: alpha in Grayscale or Palette", by Gerben Vos
Anurag Singh wrote: > > I'm trying to handle tiff images with alpha component, so i want to > know that any tiff image which is Grayscale or Palette color can have > alpha component. It is possible for greyscale, just use the ExtraSamples tag as defined in section 18 of the TIFF spec. It is not possible for palette images; the ColorMap tag uses a fixed format with exactly three values per entry. Gerben Vos.