A people-positioning project should first define its output: a person visible in an image, a position on a map, a movement track across views or a link to a named person. These outputs require different conditions. Visible detection boxes or trajectory lines do not establish measured ground coordinates or identification of a specific person.
Define deliverables by output
| Output | Inputs to confirm | Acceptance checks |
|---|---|---|
| Person observations | Accessible video, visible people and model scope | Detection, occlusion and invalid images |
| Ground position | Site map, coordinate definitions and valid calibration | Independent measured points and error definitions |
| Continuous trajectories | Time sources, cross-view correspondence and interruption rules | People crossing, reappearance and association errors |
| Named identity links | Separately confirmed identity sources and association procedures | Correct, incorrect and unknown states |
Define coordinates and time first
Map positions need an origin, axes, units, valid area and calibration version. Pixel coordinates cannot directly represent physical distance without a valid mapping. Time fields must identify acquisition events or host arrival times. A display refresh interval does not represent the full delay from a person's movement to a displayed result.
Track identifiers are not real identities
A track identifier represents the system's association of observations. It may change after occlusion, restart or an association error. Anonymous trajectories can support movement checks. An identifier or a captured face image alone does not establish named-person recognition. Named-identity tasks need separately confirmed data sources, association methods, purposes, access controls and retention periods. An algorithm name does not establish those conditions.
Define acceptance scope in a representative area
Select an area with occlusion and camera handover points. Agree on person counts, routes, lighting, statistics and fault states. Record position error, trajectory interruptions, incorrect associations and response times separately. This article describes procurement methods. It reports no new deployment, identity-recognition result or passed site acceptance.
Coordinate reference: OpenCV planar homography. Related services: Multi-camera synchronization, calibration and fusion, project consultation.