Estimates from lens, sensor width and resolution using the IEC EN 62676-4 DORI pixel densities. Real results depend on lighting, angle and the exact camera model, so check the datasheet.
How to use the planner
Drag the camera to where you would mount it and turn it with the orange handle. Move the person to a doorway, gate or driveway entry. The label shows whether that spot would be only detected, observed, recognisable or identifiable at the chosen lens and resolution.
What DORI means
DORI is a standard (IEC EN 62676-4) that defines how many pixels per metre you need on a subject: 25 to detect something is there, 63 to observe what it is doing, 125 to recognise a known person and 250 to identify a stranger. Wider lenses spread pixels thin, so they see more but cover shorter identify distances.
Limits of the estimate
The planner uses the lens focal length, sensor width and horizontal resolution. Real cameras differ in lens design, distortion and image processing, and lighting at night often reduces usable detail. Treat the figures as a planning guide and confirm against the datasheet. See also our guide to resolution and lens choice and where to place cameras.
Turn the knowledge into a working system.
AI Camera Systems supplies, installs, configures and supports Dahua AI cameras, NVRs and the DMSS app for homes and businesses across Australia.