Transport, public thoroughfares, stations: algorithmic video surveillance will be given a full-scale baptism of fire at the Paris Olympic Games, under the watchful eye of its detractors, such as Amnesty International France, who see the experiment planned until 2025 as a prelude to its widespread use. Since 2019, the Yvelines département has installed 3,255 video surveillance cameras equipped with an algorithmic anti-intrusion system in or around 150 sites. At night, when an individual crosses a virtual line in the image, it causes a change in pixels that triggers an audible signal transmitted to the departmental image supervision centre in Versailles. IMAGES AND SOUNDBITES ARRANGED IN SEQUENCES N°34NF6PB