I've search and read many threads about protect image location and watermark or something like that.
but there's no one looks great for me. that's fine, i can do it by myself.
but there are too many place to be modified... it's not good for next upgrade of coppermine
also if you hide every image location by watermark, it might crash your server's and effciency is bad.
Why protect image location??
If you have any experience in coppermine, then you properly know the folder tree where all images stored.
And the naming function is too easy to guess, once i knew the thumbnail filename, just right-click and got it, then i know the original image filename.
so the member function looks weak for any album which could be preview by thumbnail.
I think the better way is separate the place/folder of thumbnails (include normal size image) and original image
even renamed the original image
then all we have to do is protect the original image, even normal size image, by something like watermark
to hide the real path of orginal image.