Why does Alta detect vehicles but miss plates when several cars occupy one LPR zone?

Answered by ANPR AI·Sourced

Short answer

The zone may cover too much traffic.

Explanation

The guide specifies one vehicle at a time per zone and space for the largest vehicle’s bounding box.

Things to check

  • Zone placement
  • Simultaneous vehicles
  • Clipped vehicle boxes

What to do

Redraw the zone and compare vehicle and plate detection counts after fresh traffic.

Source

Avigilon Alta: configure an LPR camera

Scope and version

Official beta documentation; updated 5 June 2025. Verify against the production Alta release.

ANPR Edge

Skip the dedicated ANPR camera. Read plates from the cameras you already have.

ANPR Edge is plate-recognition software that runs on a PC at your site and works with ordinary IP cameras, so plate reads no longer depend on one vendor's camera, NVR or firmware.

  • Works with standard IP cameras over RTSP
  • One license per location covers every camera
  • Runs on a Windows PC or Mac you own

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