Use casesCrowd
…Cameras —New rule

Crowd-crush early warning

SAM 3.1 turns person tracks into people per square metre for each zone; Muse Spark watches the clip of every crowded spell.

Seen from above, a dense crowd in caps presses toward a narrow gate
Research footage, Jülich bottleneck experiment (run 030, Forschungszentrum Jülich data archive). Not a real venue.

Crowd early warning

SAM 3.1 counts. Muse Spark judges and plans. The Tier 1 model checks the frames. Voice Transcribe hears the announcements back. Every alert is chained.
not live

What the crowd watch proved

REPLAYrecorded 4 Nov 2026

8.2people/m²

33 people in the gate approach (2 x 2 m) at the peak, counted by SAM 3.1 on research footage (the Jülich bottleneck experiment).

critical Glimmer confirmed it on the frames (0.78).

Gate approach is 8.2 ppm2 with 33 people in 4 sqm and pressure 0.094, well into crush range. Side door B at 3.75 ppm2 and filling at +2.75 per min cannot take redirected flow, so inflow must be held instead.

SAM 3.1counted headsMuse Spark 1.3judged and planned25.8 sMuse Glimmer 30Bchecked the frames

Against the experiment's tracked heads: true peak 9.5 people/m², count ratio 0.996.

From the reading to a cleared gate

  1. Reading: 8.2 people/m²

    gate approach (2 x 2 m)

  2. Muse Spark: critical

    hold inflow at Outer queue barrier

  3. stewards alerted

  4. Glimmer confirmed; the alert is chained

  5. safety officer alerted

  6. safety officer: “On my way”

  7. Staff seen at the gate (blue vest)

    gate staff side

  8. Cleared

The announcement, heard back

  • Hindi
    “Kripya dhyaan dein, apni jagah par rukein, aage dhakka na dein aur stewards ke nirdesh ka intezar karein.”
  • English
    “Please wait where you are, do not push forward and follow stewards instructions.” Heard back by Muse Voice Transcribe.

One crush warning, step by step

REPLAYrecorded 4 Nov 2026

  1. Describe

    Asked in Hindi: warn us before the crowd at the main gate turns dangerous; if it fills, turn the corridor toward side door B.

    • Muse Spark 1.3

  2. Plan

    Zones on the overhead view: gate approach (2 x 2 m), entry corridor; side door B as the other route.

    • Muse Spark 1.3

  3. Prove

    Counts checked against the experiment's tracked heads: ratio 0.996, off by 1.0 person on average.

    • SAM 3.1counted heads

  4. Watch

    Peak 8.2 people/m² at the gate approach (2 x 2 m), 33 people.

    • SAM 3.1density

  5. Verify

    Glimmer looked at the frames and agreed it was critical; the alert went out 41.1 s after the reading.

    • Muse Spark 1.3judged25.8 s
    • Muse Glimmer 30B

  6. Act

    Hold inflow at Outer queue barrier; announced in Hindi and English and heard back; stewards and safety officer acknowledged.

    • Muse Voice Transcribe

  7. Evidence

    Chain intact, 9 records; alert hash b4893f2db6….

Connecting to the crowd watch…