TL;DR: Jason Koebler of 404 Media demonstrated artist Simon Weckert's "Digital Camouflage" shirt against one of Berlin's first police-run object-recognition surveillance cameras on September 1, 2026. When the shirt was held in front of his body, the camera's computer-vision model stopped labelling him as a person. The Kotbusser Tor pilot is the first permanent AI surveillance of public space in Berlin outside the subway, runs on Berlin's General Security and Public Order Act as amended in December 2025, and is funded at 2.47 million Euro in investment plus 2.13 million Euro in operating costs through 2030.
What Happened at Kotbusser Tor
404 Media reporter Jason Koebler stood in front of a camera streaming to a public video screen outside Kotbusser Tor, a busy Berlin subway stop, and held up a button-down shirt printed with what the article describes as "flowery, blurry globs of green and pink." The AI drew a green bounding box around him with the word "PERSON." When the shirt was raised, both the box and the label disappeared. When the shirt was lowered, both reappeared [1].
The shirt is the work of artist Simon Weckert, who lists "Digital Camouflage" in his 2025 exhibition record and whose Ars Electronica Linz showing is confirmed on his own site [2]. Weckert's framing is not about how the pattern works. It is about what the cameras are designed to do. "Obviously people don't like it because it means that AI is tracking the movements and behaviors of people," he told 404 Media. "It's one thing to have somebody behind the camera watching you, but now we have AI doing this kind of analysis" [1].
The camera itself does not identify faces. The pilot's stated purpose is behavior and posture detection: people, vehicles, animals, bicycles, and "other objects in their field of view," plus the ability to flag "anomalous behavior" such as a person lying on the ground, loitering, fighting, or an abandoned package, which can trigger a police response [1]. That is the surveillance layer the shirt defeats, even if only for the duration of the demonstration. The system "can detect if somebody's laying on the ground so that means homeless people could be detected and police get triggered," Weckert said [1].
What the Berlin Camera System Actually Does
Kotbusser Tor is the first site in a police pilot that Berlinspectator reported on August 4, 2026, and that 404 Media identifies as the first police-run object-recognition surveillance deployment in the city [1][3]. The legal basis is Berlin's General Security and Public Order Act (ASOG), amended in December 2025. The pilot was discussed at the Berlin House of Representatives' interior committee in March and is funded at 2.47 million Euro in investment and 2.13 million Euro in operating costs between 2026 and 2030, with a separate building-security deployment planned for Berlin's Red City Hall and the interior administration's offices on Klosterstrasse [3].
Officials are explicit that the system does not perform facial recognition. Berlin Interior Senator Iris Spranger told Berlinspectator: "The face will not be recognizable. What matters is the movement." When someone is being beaten up, "those aren't normal movements. The AI can identify that." The workflow, as Spranger described it, is "the AI indicates that something might be unusual. But a human decides what happens next" [3]. Officers see "stick-figure outlines and their movements on screen." A vendor has not yet been named; a tender is in progress and a provider is expected to be selected by the end of September [3].
The point that matters for our readers is what the system claims it can do versus what it actually does. Object detection on a still camera is not the same problem as re-identification across a city camera network, and a wearable that confuses one detection model at one site does not generalize. But the demonstration is real: a public computer-vision model, running in a live deployment, was confused by a garment. That fact is the news.
The Artist Behind the Pattern
Weckert studied New Media Art at Berlin University of Art in the Digital Media Class. His earlier work includes "Google Maps Hacks," shown in 2019 and 2020 and presented as "Hacking Google Maps" at the 2020 Chaos Computer Congress (RC3), a piece in which he used smartphones to produce a virtual traffic jam on Google Maps [2]. The body of work has a consistent method: take a sensor system the public is told to trust, expose what the sensor system cannot see, and let the gap speak for itself.
404 Media does not describe the technical mechanism by which the shirt causes the "PERSON" label to disappear. The article reports only the observed effect: bounding box and label vanish when the shirt is held up, and return when it is lowered [1]. Whether the pattern works by confusing the underlying object-detection model, by saturating the detector with high-contrast features, by exploiting a specific training-data weakness, or by sheer accident of the pattern composition on the test day is not disclosed. The article does not say so, and we will not guess.
What to Watch
The vendor selection. Berlinspectator reports a provider is expected to be selected by the end of September 2026. Watch for the procurement record, the technical specifications, and which object-recognition model the police are running [3].
The second site. The pilot is planned to extend from Kotbusser Tor to Warschauer Strasse. Watch for the deployment date and the camera density at the second site [3].
The demonstration's reproducibility. 404 Media documents the effect on one model at one site on one day. The counter-surveillance reading for readers is that the garment worked against that model on that day. Whether it generalizes is a separate question. Watch for independent reproductions against other public-camera deployments, including the kinds of citywide facial-recognition pilots we have tracked in the UK live-facial-recognition expansion and our facial-recognition counter-surveillance guide [1].
The parliamentary review. The ASOG amendment that authorizes the pilot passed in December 2025 and is subject to ongoing parliamentary review. Watch for any data-protection impact assessment publication, any expansion of the "anomalous behavior" triggers, and any change to the human-in-the-loop guarantee Spranger described [3].
Sources
- 404 Media: This "Digital Camouflage" Shirt Confuses AI-Powered Surveillance Cameras (Jason Koebler, Sep 1, 2026)
- Simon Weckert: About (artist site; Digital Camouflage 2025 Ars Electronica Linz listing; prior Google Maps Hacks work 2019-2020)
- Berlinspectator: Berlin Police Launch AI-Powered Camera Trial at Kottbusser Tor (Aug 4, 2026)