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October 2000
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2000.10.11 09:02 "Re: tiff's orientation", by Martin Bailey
At 22:11 10/10/00, Helge Blischke wrote: > Carleton, Sam wrote: > > > > I have a simply question, what is the orientation of a tiff? Is (0,0) > > lower left or upper left? If it is not consistent, how do I determine > > the orientation? > > Have a look into the TIVV V6 spec. There is a tag named "Orientation", > and how to interprete this is explained in detail there. > This tag defaults to 1, and that means the origin is the upper left > corner, the scanlines (rows) from left to right and the columns from > top to bottom But beware that many (most?) applications that read TIFF files ignore this tag and use the default. We added support for it at one stage and it caused absolute havoc - place a TIFF in XPress, print, use in-RIP OPI to replace with high-res TIFF (FPO and high-res both with same Orientation) ... oh dear, the image on the final output is upside down! So now we default to ignoring it but there's a hack you can do to honour it. Yech! Regards Martin Bailey ------------------------------------------------------------- Senior Technical Consultant mailto:martinb@harlequin.com Digital Print & Publishing +44 1223 873800 Harlequin http://www.harlequin.com ------------------------------------------------------------- If my views didn't usually coincide with those of my employer I wouldn't want to work here, but I am not a spokesman for Harlequin and the buck stops with me for what I say. -------------------------------------------------------------