20 have already been transformed into fully automated 360-degree cameras as part of the £5.4 million programme.
The network of almost 2,000 cameras is the densest anywhere in the country.
The council says the service plays a key role in detecting threatening and dangerous behaviour and reducing street crime.
CCTV operators helped the police make an arrest in over 1,000 cases over the last year.
All recordings are deleted after 30 days unless explicitly requested otherwise.