If you don't know which picture is chosen, then you may be able to be a fair judge. But I wouldn't trust a person (regardless of how unbiased they think they are -- and including myself) to judge if they know which picture has been chosen due to the confirmation bias and similar metal flaws common to humans. :)
Yea, but thats the thing.
If the Judge is the person that is testing it, they arn't trying to prove it to the testee. They are trying to prove it to themselves, so whether or not they lie, they will know whether or not the result strongly implies that there is something to remote viewing.
And, yeah I agree, it would take someone or multiple people getting it more than once, but not every time is expected, I would just like to find someone that says they can do it well and test them on it a lot, or a group of people that do it regularly, which i believe there are some groups around for it.