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2004.11.18 18:05 "[Tiff] Using TIFFGetField to get a "Rational"", by Stephen Billard
2004.11.18 19:40 "Re: [Tiff] Using TIFFGetField to get a "Rational"", by Ulf Zibis
2004.11.18 19:48 "Re: [Tiff] Using TIFFGetField to get a "Rational"", by Joris
2004.11.23 14:58 "[Tiff] Using TIFFGetField to get a "Rational"", by Frank Warmerdam
2004.11.23 20:34 "Re: [Tiff] Using TIFFGetField to get a "Rational"", by Andrey Kiselev
[...]

2004.11.18 18:05 "[Tiff] Using TIFFGetField to get a "Rational"", by Stephen Billard

I am new to LibTIFF. I want to get the ResolutionUnit, XResolution, and YResolution from a TIFF file. I have no problem getting the Resolution unit. (Although I did see a strange behavior. If I had not initialized the variable that receives the ResolutionUnit value before calling TIFFGetField, I did not get back the value. If I initialize the variable to 0, I get back the correct unit.)

I am having no luck with the X & Y Resolutions. I suspect that I don't know what kind of variable to receive the "Rational" result. I tried a Real and got garbage back. What should I be using? (I get no errors back from calling TIFFGetField.)

-Stephen
 www.sbillard.org/Stephen