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| license: mit |
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| |
| # Tencent Fall Detection: test videos and reference results |
|
|
| Six 1 fps test videos from two rooms, with the complete output of the |
| fall-detection and daily-report system for each. **Only days 6 and 11 |
| contain a fall**; the other days have none. |
|
|
| | Video | Duration | Report generation | Room | Report date | What it shows | |
| |---|---|---|---|---|---| |
| | `day_1_1fps.mp4` | 2 h 47 min | 11 min | 1 | 2026-08-06 | Resident A (the resident) and Resident B (household member) with visitors | |
| | `day_6_1fps.mp4` | 3 h 30 min | 11 min | 1 | 2026-08-07 | **a fall** by Resident A; two visitors | |
| | `day_11_1fps.mp4` | 8 h 12 min | 17 min | 1 | 2026-08-08 | **a fall** by Resident A; one brief visitor | |
| | `day_7_1fps.mp4` | 8 h 48 min | 25 min | 1 | 2026-08-09 | Resident A with visitors | |
| | `day_8_1fps.mp4` | 8 h 03 min | 20 min | 1 | 2026-08-10 | Resident A with visitors | |
| | `day_19_1fps.mp4` | 7 h 46 min | 24 min | 2 | 2026-08-11 | the face-recognition fallback: nobody enrolled for face recognition appears, so the person present longest becomes the resident, shown as "the resident" (not "Resident A") | |
|
|
| Report generation is the VLM segment summaries plus the language-model |
| summary and report, model loading included, on one NVIDIA RTX 5090. Face |
| recognition runs alongside on the CPU and does not lengthen it. |
|
|
| `results/<video name>/json_summary/daily_report.json` is the system's final |
| output (overview, timeline, narratives, routine comparison, verified falls). |
| The rest is supporting evidence: `verify/` (fall-alarm verdicts and clips), |
| `stgcn/` (detector overlay videos and the presence CSV) and the other |
| `json_summary/` files (per-segment observations and the language model's |
| input). Face-recognition data is not published. Each room-1 report compares |
| its routine with the earlier dates (day 1, the first, has none); day 19 |
| (room 2) has no baseline. |
|
|
| The reports were regenerated on 2026-10-01 with the current report code |
| (GitHub `feature/identity-linker`, commit `d4d52a1`: fall times read on the |
| right clock, visit edges fitted to the detector, the get-up time after a |
| fall, company the detector does not show removed, and other fixes). Only the |
| language-model summary and report were re-run: the detector output, the |
| fall-alarm verdicts (re-run: the same answers), the clips and the VLM segment |
| summaries are the earlier run's, except that `verify/verdicts.json` now gives each confirmed fall's |
| time on the video's own clock (`fall_time_absolute`). The report-generation |
| times above are the earlier full runs'. |
|
|
| ## Alternative models: Nemotron throughout |
|
|
| `results_nemotron/<video name>/` holds the same six days with Nemotron 3 Nano |
| Omni 30B-A3B Reasoning (NVFP4) in place of every Qwen model: fall verifier, |
| segment-summary VLM and the language model of the summary and report. Made |
| with GitHub branch `feature/vlm-variants` (commit `1ab233f`), the stages |
| `VERIFIER=nemotron MAP_VLM=nemotron SUMMARY_LLM=nemotron bash |
| bash/run_video_system.sh` runs, on the same detector output, alarm events and |
| face-recognition data as `results/`. Each folder has `json_summary/` (the |
| summary, the report and the VLM's per-segment answers), `verify/` (the alarm |
| events and Nemotron's verdicts) and `action_classes.json`; detector files and |
| clips are those of `results/`. |
|
|
| | Six days | Qwen (`results/`) | Nemotron (`results_nemotron/`) | |
| |---|---|---| |
| | Real falls confirmed (of 2) / false falls | 2 / 0 | 2 / 0 | |
| | Real visitors found (of 14) / extra people listed | 14 / 0 | 14 / 4 | |
| | Resident's time in the room, mean error per day | 3.1 % | 5.8 % | |
| | Resident's glasses described right (days) | 6 / 6 | 4 / 6 | |
| | Better daily summary in a blind comparison (days) | 3 / 6 | 3 / 6 | |
|
|
| Nemotron describes one person's clothes, glasses or hair differently from |
| one 10-minute segment to the next, so a visitor can be listed twice |
| (days 1, 6, 19) and part of the resident's day can appear as a visitor |
| (day 8). Its report calls the woman resident of day 19 "he". Qwen remains |
| the default. |
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|
