=?iso-8859-1?Q?Roland_M=F6sl?= on wrote...
| Many forums have no idea what copyright means
|
| They just link to pictures of my site
| and insert them in user profiles and forum discussions.
| Makes several GB bandwith per month.
|
| Now I have an idea, where an external referer
| is redirected to a smaller version of the picture,
| with a message below.
|
| #####################
| #####################
| #####################
| #####################
| #####################
| Original of this picture on
| here comes the address
|
| I thought to copy the original picture,
| reduce the size, for example to 400x300,
| copy it in a 400x360 and write in the lower
| part a message, on what URL the original
| picture can be found.
|
| Has somebody written a script using
| Image Magick for this?
|
| best regards
|
For annotating images, either within the image or attaching a message
to one of the sides (any side) see IM Examples
http://www.cit.gu.edu.au/~anthony/graphics/imagick6/annotating/
In your case adding the annotation into the image may be better than
resizing it to generate the same size as the original. How invasive the
notice is is up to you, but you probably don't want them just coping
your image and chopping off your annotation either.
A non-IM solution however may also be a better idea....
One way that many 'picture' sites protect their images is to only allow
images to be retrieved if they had a 'referer' that was from a known
authorized page that using the image (generally the same web site).
I am not sure how they do this, just that they do.
If you know how, mail both me and Roland, as it isn't really
ImageMagick.
It may also be posible to have have the image return as normal if
refered to from the right source, and annotate a copyright notice (or
different image entirely) if refered to from a 'bad' source.
WARNING: a referrer protection may not stop them as some web problems
(but not normal browsers) can 'fake' a referrer, though these often only
go so far as with using the image URL itself, or the sites home page URL
rather than an actual 'correct' referrer, to try to fool such systems.
I know this as I have done 'how-tos' on beating 'referrer restrictions
and done this for a specific image (personal use).
Of course if they use a broswer, the browser itself oftan caches the
image too.
Basically, you may like to do a mixture of both. Annotate to stop
coping, and a referrer protection to cut your bandwidth load, and track
miss-users of your image URLs.
Anthony Thyssen ( System Programmer ) <[EMAIL PROTECTED]>
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