> It's just frustrating that although it uses embedded metadata in this way,
> and even displays all the rest on image pages, it then strips it out of all
> derivatives!
I think this question (of EXIF metadata in images) has come up on this list before.
Lots of tools to generate thumbnails or optimise images (like the ImageMagick library or this handy app: https://imageoptim.com <https://imageoptim.com/>) routinely strip metadata from images (as do social networks etc), mainly because they increase the filesize without adding much user-discernible benefit, given that the metadata is invisible in all web browsers (unless you install one of the extensions mentioned previously).
The amount of extra overhead to the filesize might be trivial (if there’s not much metadata and the images are high resolution) or quite a bit (if there’s lots of metadata, such as full IPTC, and the images are small thumbnails).
There’s a good discussion of this here: http://www.controlledvocabulary.com/blog/top-metadata-myths.html <http://www.controlledvocabulary.com/blog/top-metadata-myths.html> (the first example shows an image where the file size increases from 30KB to 40KB when all metadata is included).
Filesize might not seem like such a big deal when there’s 3G/4G and fibre-optic home broadband available relatively cheaply, but given that there’s also a lot of access via slow and flaky phone connections, it’s worth paying attention to – (even the difference between a webpage that loads in 2 seconds vs 4 seconds can count for a lot in terms of user experience).
So, whilst I’d certainly recommend embedding some of the most useful metadata in the big, downloadable versions of your images – for thumbnails I’m not so sure it’s worth the trade-off.
Cheers,
Frankie
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