Hi Christophe,

Firstly, I'm amazed that you're still using Windows XP. Microsoft support/updates ended for this nearly 5 years ago, so it's a risky platform to use these days. Most IT sections forcibly removed XP machines from their networks some years ago for security reasons.

From a digital preservation point of view I wouldn't recommend using LZW compression. Although the patent is expired some years ago - there is always the risk that this could be challenged in some way, or that decoding will become a problem in the distant future. There is also the risks associated with bit rot on compressed files.

Have you tried using a different piece of software to change the keywords? like Photoshop?

Scott

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Hi everyone,

I just realized recently that when I changed a keyword from a TIFF pictures through the Properties windows of the file, then Windows XP automaticaly save the TIFF file with a LZW compression.

So I got two questions for you :
    1 - Does anyone found a solution to stop Windows doing that ?
    2 - Does anyone of you is accepting to keep TIFF files with LZW compression ?

Thanks for your help,
Christophe
Photographer for the Reveal Project @ National Trust for Scotland

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-- 
Scott Waby - Head of Digitisation
The National Library of Wales / Llyfrgell Genedlaethol Cymru
Tel: 01970 632542

The opinions expressed herein are the sender's
and do not represent those of The National Library of Wales.

Barn awdur y llythyr a fynegir yma ac nid yw'n
cynrychioli o raid farn y Llyfrgell Genedlaethol.

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