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From: Bob Friesenhahn <bfriesen@simple.dallas.tx.us>
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To: Frank Warmerdam <warmerdam@pobox.com>
cc: Chris Cox <ccox@adobe.com>, TIFF Remote Sensing <tiff@remotesensing.org>
Subject: Re: [Tiff] displaying 12 bit tiff image
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Date: Tue, 10 Feb 2004 18:21:55 -0600 (CST)
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Status: RO

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

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