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December 2008
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2008.12.17 15:54 "Re: Extracting layers from a TIFF file", by Gerben Vos
Mitesh wrote: > Our tiff files are created in Photoshop composing of several layers > (50 +) and then saved in a tiff file. > Now I have to write code to separate each layer information embedded > in the tiff file and GENERATE A SEPARATE FILE for each layer. Or in > other words decompose the combined layers Layers do not exist in standard TIFF. Because TIFF is very flexible and extendable, it is possible that Adobe has defined a method to store layers in TIFF. This would be non-standard, which is perfectly fine by the way. However, I do not know about how they did it, and I get the impression that most people on this mailing list do not. Look on Adobe's web site, or ask them. It is actually quite likely that when you save a PSD to TIFF, the layers information is not saved at all to the TIFF. Maybe we can help you a little bit further if you post the output of the "tiffinfo" utility, applied to your TIFF, to the mailing list, like others have also already asked. > Do you all mean to say in Tiff layer data is stored as channels? I don't know. One of the ways I can think of that Adobe *may* have used to implement layers in TIFF would be by using channels. If they did, that would be a non-standard use of channels, however. For example, a normal RGB TIFF contains exactly three channels: red, green and blue. Again, post the tiffinfo output and we can maybe help you. Gerben Vos.