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February 2004
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2004.02.11 00:21 "Re: displaying 12 bit tiff image", by Bob Friesenhahn
On Tue, 10 Feb 2004, Frank Warmerdam wrote: > > Chris, > > I would note that remote sensing sensor data is routinely distributed > as 16 bits per sample, but with a dynamic range far from the complete > 0..65535 range in order to preserve the original sensor results. In cases > like this remote sensing applications are expected to scale the data > themselves, and there are many approaches to doing that. > > My point is that while a "simple picture" that is stored as 16bit might > need to be pre-scaled in the TIFF file in the range 0-65535, there are > respectible reasons to deliver other kinds of "scientfic data" such that > this is not done. Some kinds of applications should be prepared for this > to happen. Is there a way to tell what scaling should be supplied in order to view the unscaled data? Perhaps using black and white levels? Bob ====================================== Bob Friesenhahn bfriesen@simple.dallas.tx.us http://www.simplesystems.org/users/bfriesen