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September 2008
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2008.09.10 20:46 "Re: SAMPLEFORMAT_IEEEFP", by <acanicio@astrosnap.com>
Chris Cox wrote: > > The info palette reads out exact values from the file, unaffected by any > display transforms. (so if you change the display exposure, the values > still read out the same). > If you want to see the floating point values in the info palette, set the > readout to show 32 bit values (right now you have 16 bit values showing). > Apparently you missed the documentation on how to use the Info palette. > > The loss of contrast could be due to gamma encoding (32 bit data in > Photoshop is always gamma 1.0), or a problem with your display profile > (since Photoshop always converts from the document profile to your display > profile for accurate image viewing). > > The TIFF file has no limits specified, it just provides the data. > The zero to one range for viewing is just a default, and a convention > found in many HDR images. > > Chris > > Chris, Yes, I only saw later on that I could switch the "info" window to floating point values. Thank you. I'm trying to set some other tags, in order to enhance compatibility with some specific software I use. For example I have to set the both TIFFTAG_SMINSAMPLEVALUE and TIFFTAG_SMAXSAMPLEVALUE to some specific values. The setfield method seems to work, but when I open the file with AsTIffTagViewer, both values stay at 0, even if I set TIFFTAG_SMAXSAMPLEVALUE to 1 or any other value. Any idea about this issue ? I have the same problem with TIFFTAG_XRESOLUTION and TIFFTAG_YRESOLUTION. I can set any value I want. When I read the file back, the values are 0. Thank you again. Best regards Axel -- View this message in context: http://www.nabble.com/SAMPLEFORMAT_IEEEFP-tp19363616p19422783.html Sent from the Tiff / LibTiff mailing list archive at Nabble.com.