Re: Akua Sweets
Re: Akua Sweets
- Subject: Re: Akua Sweets
- From: Helmut Fuchs <email@hidden>
- Date: Thu, 2 Aug 2007 14:33:30 +0200
Ken,
AFAIK the compression level in a JPEG file is only present in files
created with Photoshop (or written by programs that try to act like
Photoshop).
I have once written a Perl script to allow modifications on these
Photoshop image resource blocks (for example to transfer paths from
one file to another).
While toying around with these image resource blocks I found the
compression level to have informal value at best: As soon as image
processing tools other than Photoshop have been used, the compression
level that is saved and the actual image quality don't seem to match
very well.
When you save JPEG compressed TIFF files from Photoshop then this
info is not even included.
So maybe you're better off to just drop this information. Or use some
heuristic based on dimension, depth and image file size to quantify
the quality.
If you use do shell script and mdls to access the Spotlight index and
parse the returned data string you definitely won't need to open the
files - if they already have been indexed.
HTH,
Helmut
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