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Date: Wed, 04 Jul 2012 18:10:22 +0200
From: Simon Ochsenreither <simon.ochsenreither@kit.edu>
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	FILETIME=[83D04750:01CD59FF]
Subject: Re: [Tiff] How to set the "physical size" of an image when writing
 a Tiff file?
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Hi Olivier,

thanks for your kind reply.
> There is no "physical size" tag that I'm aware of. What TIFF files
> store is the size in pixels as well as the resolution in pixels/"some
> unit". The physical size can be computed from these values. What
> you're using to view the tags obviously does some interpretation so I
> can't tell exactly what is missing (the output of tiffinfo would be
> more useful).
The snippet I pasted into the mail was from ImageJ, I'll try tiffinfo in 
a minute!

> It looks like some or all of these tags are missing or
> invalid for the images:
>
> TIFFTAG_XRESOLUTION
> TIFFTAG_YRESOLUTION
> TIFFTAG_RESOLUTIONUNIT
Thanks a lot! I'll look into that.

Bye,

Simon

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