hi,

the only thing that's needed is a copy-image-with-headers function that also copies the exif info as those images are identical. i know, there are modification time stamps too, but is a resizing/copy a modification? not really, i guess.

regarding your SourceForge submitting proposal: as i said i am just getting into it and happy being able to read/write exif on my uploaded images. all this is far from perfect but once out of this pre-alpha-stage i may be thinking of it.

andré


Martin Geisler wrote:
"Andre M. Winter - Carto.net" <[EMAIL PROTECTED]> writes:

hi,

this is only a PEL related question.

i am editing exif data from uploaded images and i am generating
thumbnails and other sizes form that same images with functions
relying on imagecopyresampled(). the pity with that is that it
ignores *all* header info (see
<http://www.geotrace.net/pix/a666/06_bremgarten_railway_bridge.jpeg>)
for an example). i know i could use PEL to tag all those images
again, but aren't there PHP-bases functions that include image
headers on resize/resample?

I don't think so, or at least I've never seen such a function.  But
it's a good idea!

Writing such a function with PEL shouldn't be too much trouble and
would be a great example...  If you already have such code, then
please submit a patch at SourceForge, if not, then you'll have to wait
until I get to look at it --- it's exam season right now...

Some thoughts: Writing the headers back unchanged would probably be
okay for most things, but a more sophisticated function would adjust
tags like width and height, and maybe the digitized timestamp (maybe,
I don't remember the exact conditions for updating it).



--
___________________________________________________________________
andre m. winter,
 cartography for internet and multimedia applications
 schiessstand 4/1, a6091 goetzens, tyrol, austria
 tel.: ++43.5234.32732
 email: <[EMAIL PROTECTED]>

<http://www.vectoreal.com/>          SVG consulting and development
<http://www.carto.net/>          online cartography focusing on SVG
<http://www.carto.at/> print and online touristic map solutions



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