The fact that I did it that way was that I was trying to do it with GD first, then realised that it's not installed on the test server, and I needed to put a live version, so I switched to Image::Magick, which is the first time I use. So $image->GetPixel($x, $y) became $image->Get("pixel[$x,$y]").

And besides, the documentation of Image::Magick is still a bit greek to me.

Thanks for the advice.

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He who asks will be a fool for five minutes, but he who doesn't ask will remain a fool for life.

Chady | http://chady.net/