YO WTF....the judge decides the photos using a piece of string????

more importantly, does he shut one eye like Mr Bird?

According to Veitch's book, Mr Bird shut one eye and had an inside man signalling from the judge's box.

same bit of string he uses to keep his trousers up.

wheres hawk eye ?

Ramruma, the man in the judge's box also used a piece of string with a weight on the end of it