choice stringlengths 8 28 | picked stringlengths 38 121 | why stringlengths 69 158 |
|---|---|---|
Detection model | D-FINE, Apache-2.0, BF16, N to X tiers | Unconditional license keeps the weights in the operator's hands; N through L fit the 48 GB card; ahead of DEIM on matched compute in the July 2026 comparison. |
Site inference server | 48 GB PCIe inference GPU class server in the ASHRAE A2 conditioned server room, N+1 | The entry class for plant server rooms running vision, and retrospective search plus 80 to 120 streams of decode fit it with headroom for a second model. |
Recorder and serving runtime | Frigate NVR v0.18.0 with its built-in ONNX detector runtime | Open source the operator owns outright; keeps 30-day retention, ONVIF and RTSP exits and local detection without per-camera license rents. |
Camera heads | Fixed multi-sensor thermal and visible heads, no wireless radios, Section 889 screened with producer-of-record statements | Zone coverage needs always-present calibrated views, and camera provenance is the first procurement gate on a test site. |
Site networking | Managed PoE switches over underground single-mode fiber, two strands per pole | The requirement fixes the fiber architecture, and PoE Type 1 and 2 per-port budgets cover the heads without pole-side power electronics. |
Enclosures and power | NEMA-rated outdoor enclosures, 277/120/24 V step-down transformer feeds, Network UPS Tools for clean shutdown | Heat, storms and sun angle degrade heads and light budgets, and clean shutdown protects the archive. |
Time synchronization | OCP Time Card GNSS grandmaster with holdover oscillator, Chrony 4.9, linuxptp where PTP-aware switches exist | Evidentiary ordering across 80 to 120 recorded streams requires one clock. |
Identity | Keycloak on-premise single sign-on with hardware token sign on for Linux hosts | Only booth operators and the safety office reach the isolated network, under the operator's identity policy. |
Observability | Prometheus, Grafana and Loki on the isolated network | Camera uptime must be a first-class metric, not a vendor health page. |
Sizing rules | The survey evidence pack, pixels on target first, low light as a budget, mounting geometry decides what you see | Coverage is proven in phase one evidence, never assumed from a camera count. |
Patterns | A site-scale camera onboarding reference architecture and an on-premises video search blueprint | Onboarding, clip retrieval and search patterns adopted with no managed cloud, keeping the audio visual core on-premises. |
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