I think I'll wait until tomorrow before asking for deletion, to let the participant answer (just in case [?]).

I have another question about the topic: should I disqualify invalid images (e.g. from monuments that aren't on the lists) immediately, or wait (until when? the end of the contest?)?

Racso

2012/9/3 Racso <racso@colombia.com>
Hello.

I have detected that a participant just uploaded photographs he found on internet, so I must proceed to mark them for deletion. Sigh.

My question is, Does someone know about any [semi-]automated tool to verify if uploaded images already existed? I use Google image search, but that tool requires checking single images at a time.

Thanks,
Racso