G20 week begins in Brisbane

World leaders, the media, tourists and protesters will soon begin to converge on Brisbane for the G20 summit this weekend.

Security agencies are scanning the city 24 hours a day and barricades have been going up around the restricted zones where dignitaries will be meeting and sleeping.

Special G20 laws came into force on Friday evening and one man has been already been banned from the area.

He was charged after allegedly refusing to provide police with his details after taking photos of the Brisbane Convention and Exhibition Centre on Saturday night.

The first official G20-related protest, featuring about 100 people dressed as corporate accountants to highlight multinational tax dodging, was held peacefully without anyone being arrested on Saturday.

Meanwhile, the cultural festivities roll on as locals use the River City's moment in the spotlight to show it off to the world.

The popular Colour Me Brisbane Carnival wrapped up on Sunday, but the official music program, street art and sculpture installations and the Small Batch food markets will continue through the week.