Sporting louts be warned: Big Brother has 800 sets of eyes and they’re just waiting for you to play up at the footy or the cricket.

The Sydney Cricket Sporting Ground Trust is in the final stages of completing a $3.5 million upgrade of its security system, the highlight of which will be 800 CCTV cameras in time for this summer’s Ashes, up from the current 500.

All cameras are in high definition and ultra-high definition, and can film every seat inside both the SCG and Allianz Stadium.

Cameras hanging from the famous SCG light towers can zoom in on fans approaching the ground from 1.5km away.

They are linked to a security system equipped with facial recognition, which can alert authorities to banned patrons accessing the stadiums.

“It’s based off an analytics package and that package is running computers at the back of the CCTV cameras all the time and basically identifies people off a set database and flags that with the operator,’’ Luke Schibeci, head of security for the Trust, said.

“The operator doesn’t need to be watching the cameras for a person who may be a banned spectator or a person of interest to be identified.’’

During a trial run of the facial recognition technology at the A-League Grand Final in May, six banned fans were detected walking to the ground and were stopped from entering the stadium.

Incredibly, the system also flags bags which have been left unattended for a long periods of time, or cars suspiciously parked in the surrounding area.

Other highlights of the upgraded security include:

• A secret, double-locked Venue Operations Centre (VOC) which, 24 hours a day, 365 days a year, monitors the entire precinct and its surrounds

• The room features a 6.4-metre wide video wall constantly running images from dozens of the 800 cameras

• The VOC is occupied during events by decision makers from security, catering, ticketing, cleaning and social media, through to external stakeholders such as NSW Police, Traffic Management Centre and State Transit Authority

Trust CEO Jamie Barkley said the system was by far the most sophisticated control centre in Australian stadiums, and one of the best in the world.

“We’re pleased that we’ve matched that of the Super Bowl in San Francisco two years ago and also even at Wembley Stadium in London,’’ Mr Barkley said.

The Trust didn’t hesitate on spending the money.

“We’ve taken the decision here to ensure every sports fan coming to our grounds is going to feel at least comfortable in the knowledge they are being well looked after,’’ Mr Barkley said.