France is testing Artificial Intelligence (AI) based video surveillance on the weekend which could also be used at this summer's Olympics in Paris.
The Paris police prefecture has authorised railway company SNCF and transport operators RATP to to analyse images from more than 100 surveillance camera by using intelligent and algorithm-based technology.
The test will take place in four stations, around a Black Eyed Peas concert in the Défence Arena and football match between Paris Saint-Germain and Olympique Lyon at Parc des Princes stadium.
The software is to recognize people entering non-public or sensitive areas, crowd movement in risk areas, unusually large crowd gatherings and unclaimed luggage.
A first test was conducted last month around two Depeche Mode concerts.
The method is set to used at the July 26-August 11 Olympics, but without facial recognition which is being used in certain conditions in France. Body scanners will also be in operation at Olympic venues.
AI-based surveillance has not reached its goals yet but the Olympics are seen as a good event to experiment with it.
Security is a major aspect around the Games which are to commence with a first-ever opening ceremony not held in a stadium. Instead, athletes are to travel by boat on the River Seine through the French capital.
France has raised its terror alert to the highest level after last months's attack on a concert hall in Moscow.
President Emmanuel Macron has said that the opening ceremony could be moved to Trocadéro square or the Stade de France in the case of a terror threat.
Tens of thousands of police and other security forces are to safeguard the Games.