License plate recognition (ALPR) engines

An automated license plate recognition (ALPR) engine extracts text strings from images or videos of vehicle license plates.

Engine output

License plate detections can be reported in engine output by specifying an object of type: licensePlate. An object definition can exist in either the object array (for non-time-based detections) or in an object key in the series array (for time-based detections).

Example

Here is an example of proper engine output for objects detected within a time series:

{
  "schemaId": "https://docs.veritone.com/schemas/vtn-standard/master.json",
  "validationContracts": [
    "license-plate"
  ],
  "series": [
    {
      "startTimeMs": 20000,
      "stopTimeMs": 21000,
      "object": {
        "confidence": 0.949964599609375,
        "label": "4CZH511",
        "type": "licensePlate"
      }
    },
    {
      "startTimeMs": 14000,
      "stopTimeMs": 15000,
      "object": {
        "confidence": 0.9494956970214844,
        "label": "VER1TON",
        "type": "licensePlate"
      }
    }
  ]
}

• See the cognitive engine classes.
• See an overview of cognitive technology.
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• Capability
• Vision
• License plate recognition