Event Debug

ALPR Debug

Event #373464
Stream road
Status processed_no_match
Strategy frigate_plate_first
Detect —
OCR —

Selected Media

This is the event media currently shown elsewhere in the UI.

Detection Log
Selected event media

ALPR Attempts

Each recorded input and the corresponding service outcome for this event.

event_snapshot_vehicle_bbox

Snapshot

Input ALPR input
Full Frame Full frame
Count 0 Unfiltered 1 No candidate

Service Payload

Sanitized ALPR response for this attempt.

 
{
  "annotated": true,
  "annotated_image_base64": "\u003comitted\u003e",
  "count": 0,
  "detections": [],
  "filter": {
    "accept_short_dateless": false,
    "country": "United Kingdom",
    "method": "model_country_match_plus_uk_format_validation",
    "min_valid_plate_len": 5,
    "strict_uk_plate_validation": true
  },
  "model": {
    "detector": "yolo-v9-t-384-license-plate-end2end",
    "detector_conf_thresh": 0.4,
    "ocr": "cct-s-v2-global-model"
  },
  "processing_ms": 22.45,
  "rejected_count": 0,
  "rejected_detections": [],
  "unfiltered_count": 1
}

event_snapshot_full_frame

Snapshot

Input ALPR input
Full Frame Full frame
Count 0 Unfiltered 1 No candidate

Service Payload

Sanitized ALPR response for this attempt.

 
{
  "annotated": true,
  "annotated_image_base64": "\u003comitted\u003e",
  "count": 0,
  "detections": [],
  "filter": {
    "accept_short_dateless": false,
    "country": "United Kingdom",
    "method": "model_country_match_plus_uk_format_validation",
    "min_valid_plate_len": 5,
    "strict_uk_plate_validation": true
  },
  "model": {
    "detector": "yolo-v9-t-384-license-plate-end2end",
    "detector_conf_thresh": 0.4,
    "ocr": "cct-s-v2-global-model"
  },
  "processing_ms": 8.71,
  "rejected_count": 0,
  "rejected_detections": [],
  "unfiltered_count": 1
}

event_snapshot_plate_bbox

Snapshot

Input ALPR input
Full Frame Full frame
Count 0 Unfiltered 0 No candidate

Service Payload

Sanitized ALPR response for this attempt.

 
{
  "annotated": true,
  "annotated_image_base64": "\u003comitted\u003e",
  "count": 0,
  "detections": [],
  "filter": {
    "accept_short_dateless": false,
    "country": "United Kingdom",
    "method": "model_country_match_plus_uk_format_validation",
    "min_valid_plate_len": 5,
    "strict_uk_plate_validation": true
  },
  "model": {
    "detector": "yolo-v9-t-384-license-plate-end2end",
    "detector_conf_thresh": 0.4,
    "ocr": "cct-s-v2-global-model"
  },
  "processing_ms": 6.34,
  "rejected_count": 0,
  "rejected_detections": [],
  "unfiltered_count": 0
}

recording_snapshot_frame

Frame 1 · -0.50s

Input ALPR input
Full Frame Full frame
Count 0 Unfiltered 0 No candidate

Service Payload

Sanitized ALPR response for this attempt.

 
{
  "annotated": true,
  "annotated_image_base64": "\u003comitted\u003e",
  "count": 0,
  "detections": [],
  "filter": {
    "accept_short_dateless": false,
    "country": "United Kingdom",
    "method": "model_country_match_plus_uk_format_validation",
    "min_valid_plate_len": 5,
    "strict_uk_plate_validation": true
  },
  "model": {
    "detector": "yolo-v9-t-384-license-plate-end2end",
    "detector_conf_thresh": 0.4,
    "ocr": "cct-s-v2-global-model"
  },
  "processing_ms": 9.59,
  "rejected_count": 0,
  "rejected_detections": [],
  "unfiltered_count": 0
}

recording_snapshot_frame

Frame 2 · -0.21s

Input ALPR input
Full Frame Full frame
Count 0 Unfiltered 0 No candidate

Service Payload

Sanitized ALPR response for this attempt.

 
{
  "annotated": true,
  "annotated_image_base64": "\u003comitted\u003e",
  "count": 0,
  "detections": [],
  "filter": {
    "accept_short_dateless": false,
    "country": "United Kingdom",
    "method": "model_country_match_plus_uk_format_validation",
    "min_valid_plate_len": 5,
    "strict_uk_plate_validation": true
  },
  "model": {
    "detector": "yolo-v9-t-384-license-plate-end2end",
    "detector_conf_thresh": 0.4,
    "ocr": "cct-s-v2-global-model"
  },
  "processing_ms": 6.92,
  "rejected_count": 0,
  "rejected_detections": [],
  "unfiltered_count": 0
}

recording_snapshot_frame

Frame 3 · 0.07s

Input ALPR input
Full Frame Full frame
Count 0 Unfiltered 1 No candidate

Service Payload

Sanitized ALPR response for this attempt.

 
{
  "annotated": true,
  "annotated_image_base64": "\u003comitted\u003e",
  "count": 0,
  "detections": [],
  "filter": {
    "accept_short_dateless": false,
    "country": "United Kingdom",
    "method": "model_country_match_plus_uk_format_validation",
    "min_valid_plate_len": 5,
    "strict_uk_plate_validation": true
  },
  "model": {
    "detector": "yolo-v9-t-384-license-plate-end2end",
    "detector_conf_thresh": 0.4,
    "ocr": "cct-s-v2-global-model"
  },
  "processing_ms": 12.06,
  "rejected_count": 0,
  "rejected_detections": [],
  "unfiltered_count": 1
}

recording_snapshot_frame

Frame 4 · 0.36s

Input ALPR input
Full Frame Full frame
Count 1 Unfiltered 1 Detect 0.79 OCR 0.62 Candidate found

Best Candidate

Best candidate extracted from the service response for this attempt.

 
{
  "bbox": [
    76.0,
    116.0,
    137.0,
    137.0
  ],
  "confidence": 0.7901241779327393,
  "country_match": "United Kingdom",
  "detection_confidence": 0.7901241779327393,
  "filename": "frame_000004_focus.jpg",
  "frame_index": 0.0,
  "ocr_confidence": 0.6249749079346657,
  "plate_height_px": 21.0,
  "plate_width_px": 61.0,
  "quality_score": 0.6958,
  "raw": {
    "bbox": [
      76.0,
      116.0,
      137.0,
      137.0
    ],
    "country_match": "United Kingdom",
    "detection_confidence": 0.7901241779327393,
    "filename": "frame_000004_focus.jpg",
    "frame_index": 0,
    "ocr_char_confidences": [
      0.4980117678642273,
      0.3435348868370056,
      0.646439790725708,
      0.8763453364372253,
      0.28677791357040405,
      0.3972778022289276,
      0.2099183648824692,
      0.9918707609176636,
      0.9997362494468688,
      0.9998362064361572
    ],
    "ocr_confidence": 0.6249749079346657,
    "ocr_min_char_confidence": 0.2099183648824692,
    "plate": "DC50DVS",
    "plate_validation": {
      "format": "current_gb",
      "input": "DC50DVS",
      "normalised": "DC50DVS",
      "reasons": [],
      "valid": true
    },
    "polygon": null,
    "quality": {
      "area_score": 0.1916,
      "bbox": {
        "area_ratio": 0.002396,
        "height_px": 21,
        "min_margin_px": 76,
        "required_margin_px": 8,
        "width_px": 61
      },
      "country_score": 1.0,
      "edge_penalty": 0.0,
      "format_score": 1.0,
      "sharpness_score": 1.0
    },
    "quality_score": 0.6958,
    "raw": {
      "detection": {
        "bounding_box": {
          "x1": 76,
          "x2": 137,
          "y1": 116,
          "y2": 137
        },
        "confidence": 0.7901241779327393,
        "label": "License Plate"
      },
      "ocr": {
        "confidence": [
          0.4980117678642273,
          0.3435348868370056,
          0.646439790725708,
          0.8763453364372253,
          0.28677791357040405,
          0.3972778022289276,
          0.2099183648824692,
          0.9918707609176636,
          0.9997362494468688,
          0.9998362064361572
        ],
        "region": "United Kingdom",
        "region_confidence": 0.97499018907547,
        "text": "DC50DVS"
      }
    },
    "rejected": false,
    "rejection_reasons": []
  },
  "rejected": false,
  "text": "DC50DVS"
}

Service Payload

Sanitized ALPR response for this attempt.

 
{
  "annotated": true,
  "annotated_image_base64": "\u003comitted\u003e",
  "count": 1,
  "detections": [
    {
      "bbox": [
        76.0,
        116.0,
        137.0,
        137.0
      ],
      "country_match": "United Kingdom",
      "detection_confidence": 0.7901241779327393,
      "filename": "frame_000004_focus.jpg",
      "frame_index": 0,
      "ocr_char_confidences": [
        0.4980117678642273,
        0.3435348868370056,
        0.646439790725708,
        0.8763453364372253,
        0.28677791357040405,
        0.3972778022289276,
        0.2099183648824692,
        0.9918707609176636,
        0.9997362494468688,
        0.9998362064361572
      ],
      "ocr_confidence": 0.6249749079346657,
      "ocr_min_char_confidence": 0.2099183648824692,
      "plate": "DC50DVS",
      "plate_validation": {
        "format": "current_gb",
        "input": "DC50DVS",
        "normalised": "DC50DVS",
        "reasons": [],
        "valid": true
      },
      "polygon": null,
      "quality": {
        "area_score": 0.1916,
        "bbox": {
          "area_ratio": 0.002396,
          "height_px": 21,
          "min_margin_px": 76,
          "required_margin_px": 8,
          "width_px": 61
        },
        "country_score": 1.0,
        "edge_penalty": 0.0,
        "format_score": 1.0,
        "sharpness_score": 1.0
      },
      "quality_score": 0.6958,
      "raw": {
        "detection": {
          "bounding_box": {
            "x1": 76,
            "x2": 137,
            "y1": 116,
            "y2": 137
          },
          "confidence": 0.7901241779327393,
          "label": "License Plate"
        },
        "ocr": {
          "confidence": [
            0.4980117678642273,
            0.3435348868370056,
            0.646439790725708,
            0.8763453364372253,
            0.28677791357040405,
            0.3972778022289276,
            0.2099183648824692,
            0.9918707609176636,
            0.9997362494468688,
            0.9998362064361572
          ],
          "region": "United Kingdom",
          "region_confidence": 0.97499018907547,
          "text": "DC50DVS"
        }
      },
      "rejected": false,
      "rejection_reasons": []
    }
  ],
  "filter": {
    "accept_short_dateless": false,
    "country": "United Kingdom",
    "method": "model_country_match_plus_uk_format_validation",
    "min_valid_plate_len": 5,
    "strict_uk_plate_validation": true
  },
  "model": {
    "detector": "yolo-v9-t-384-license-plate-end2end",
    "detector_conf_thresh": 0.4,
    "ocr": "cct-s-v2-global-model"
  },
  "processing_ms": 11.05,
  "rejected_count": 0,
  "rejected_detections": [],
  "unfiltered_count": 1
}

recording_snapshot_frame

Frame 5 · 0.64s

Input ALPR input
Full Frame Full frame
Count 1 Unfiltered 1 Detect 0.84 OCR 0.61 Candidate found

Best Candidate

Best candidate extracted from the service response for this attempt.

 
{
  "bbox": [
    201.0,
    206.0,
    270.0,
    234.0
  ],
  "confidence": 0.8418675065040588,
  "country_match": "United Kingdom",
  "detection_confidence": 0.8418675065040588,
  "filename": "frame_000005_focus.jpg",
  "frame_index": 0.0,
  "ocr_confidence": 0.6069301962852478,
  "plate_height_px": 28.0,
  "plate_width_px": 69.0,
  "quality_score": 0.7193,
  "raw": {
    "bbox": [
      201.0,
      206.0,
      270.0,
      234.0
    ],
    "country_match": "United Kingdom",
    "detection_confidence": 0.8418675065040588,
    "filename": "frame_000005_focus.jpg",
    "frame_index": 0,
    "ocr_char_confidences": [
      0.6315962076187134,
      0.49585816264152527,
      0.3725703954696655,
      0.7021486759185791,
      0.3888002634048462,
      0.2899591326713562,
      0.3684798181056976,
      0.8547877073287964,
      0.9744048118591307,
      0.9906967878341676
    ],
    "ocr_confidence": 0.6069301962852478,
    "ocr_min_char_confidence": 0.2899591326713562,
    "plate": "4490BLB",
    "plate_validation": {
      "format": "dateless_numbers_first",
      "input": "4490BLB",
      "normalised": "4490BLB",
      "reasons": [],
      "valid": true
    },
    "polygon": null,
    "quality": {
      "area_score": 0.289,
      "bbox": {
        "area_ratio": 0.003613,
        "height_px": 28,
        "min_margin_px": 201,
        "required_margin_px": 8,
        "width_px": 69
      },
      "country_score": 1.0,
      "edge_penalty": 0.0,
      "format_score": 1.0,
      "sharpness_score": 1.0
    },
    "quality_score": 0.7193,
    "raw": {
      "detection": {
        "bounding_box": {
          "x1": 201,
          "x2": 270,
          "y1": 206,
          "y2": 234
        },
        "confidence": 0.8418675065040588,
        "label": "License Plate"
      },
      "ocr": {
        "confidence": [
          0.6315962076187134,
          0.49585816264152527,
          0.3725703954696655,
          0.7021486759185791,
          0.3888002634048462,
          0.2899591326713562,
          0.3684798181056976,
          0.8547877073287964,
          0.9744048118591307,
          0.9906967878341676
        ],
        "region": "United Kingdom",
        "region_confidence": 0.6036084294319153,
        "text": "4490BLB"
      }
    },
    "rejected": false,
    "rejection_reasons": []
  },
  "rejected": false,
  "text": "4490BLB"
}

Service Payload

Sanitized ALPR response for this attempt.

 
{
  "annotated": true,
  "annotated_image_base64": "\u003comitted\u003e",
  "count": 1,
  "detections": [
    {
      "bbox": [
        201.0,
        206.0,
        270.0,
        234.0
      ],
      "country_match": "United Kingdom",
      "detection_confidence": 0.8418675065040588,
      "filename": "frame_000005_focus.jpg",
      "frame_index": 0,
      "ocr_char_confidences": [
        0.6315962076187134,
        0.49585816264152527,
        0.3725703954696655,
        0.7021486759185791,
        0.3888002634048462,
        0.2899591326713562,
        0.3684798181056976,
        0.8547877073287964,
        0.9744048118591307,
        0.9906967878341676
      ],
      "ocr_confidence": 0.6069301962852478,
      "ocr_min_char_confidence": 0.2899591326713562,
      "plate": "4490BLB",
      "plate_validation": {
        "format": "dateless_numbers_first",
        "input": "4490BLB",
        "normalised": "4490BLB",
        "reasons": [],
        "valid": true
      },
      "polygon": null,
      "quality": {
        "area_score": 0.289,
        "bbox": {
          "area_ratio": 0.003613,
          "height_px": 28,
          "min_margin_px": 201,
          "required_margin_px": 8,
          "width_px": 69
        },
        "country_score": 1.0,
        "edge_penalty": 0.0,
        "format_score": 1.0,
        "sharpness_score": 1.0
      },
      "quality_score": 0.7193,
      "raw": {
        "detection": {
          "bounding_box": {
            "x1": 201,
            "x2": 270,
            "y1": 206,
            "y2": 234
          },
          "confidence": 0.8418675065040588,
          "label": "License Plate"
        },
        "ocr": {
          "confidence": [
            0.6315962076187134,
            0.49585816264152527,
            0.3725703954696655,
            0.7021486759185791,
            0.3888002634048462,
            0.2899591326713562,
            0.3684798181056976,
            0.8547877073287964,
            0.9744048118591307,
            0.9906967878341676
          ],
          "region": "United Kingdom",
          "region_confidence": 0.6036084294319153,
          "text": "4490BLB"
        }
      },
      "rejected": false,
      "rejection_reasons": []
    }
  ],
  "filter": {
    "accept_short_dateless": false,
    "country": "United Kingdom",
    "method": "model_country_match_plus_uk_format_validation",
    "min_valid_plate_len": 5,
    "strict_uk_plate_validation": true
  },
  "model": {
    "detector": "yolo-v9-t-384-license-plate-end2end",
    "detector_conf_thresh": 0.4,
    "ocr": "cct-s-v2-global-model"
  },
  "processing_ms": 14.03,
  "rejected_count": 0,
  "rejected_detections": [],
  "unfiltered_count": 1
}

recording_snapshot_frame

Frame 6 · 0.93s

Input ALPR input
Full Frame Full frame
Count 0 Unfiltered 1 No candidate

Service Payload

Sanitized ALPR response for this attempt.

 
{
  "annotated": true,
  "annotated_image_base64": "\u003comitted\u003e",
  "count": 0,
  "detections": [],
  "filter": {
    "accept_short_dateless": false,
    "country": "United Kingdom",
    "method": "model_country_match_plus_uk_format_validation",
    "min_valid_plate_len": 5,
    "strict_uk_plate_validation": true
  },
  "model": {
    "detector": "yolo-v9-t-384-license-plate-end2end",
    "detector_conf_thresh": 0.4,
    "ocr": "cct-s-v2-global-model"
  },
  "processing_ms": 8.11,
  "rejected_count": 0,
  "rejected_detections": [],
  "unfiltered_count": 1
}

recording_snapshot_frame

Frame 7 · 1.21s

Input ALPR input
Full Frame Full frame
Count 0 Unfiltered 1 No candidate

Service Payload

Sanitized ALPR response for this attempt.

 
{
  "annotated": true,
  "annotated_image_base64": "\u003comitted\u003e",
  "count": 0,
  "detections": [],
  "filter": {
    "accept_short_dateless": false,
    "country": "United Kingdom",
    "method": "model_country_match_plus_uk_format_validation",
    "min_valid_plate_len": 5,
    "strict_uk_plate_validation": true
  },
  "model": {
    "detector": "yolo-v9-t-384-license-plate-end2end",
    "detector_conf_thresh": 0.4,
    "ocr": "cct-s-v2-global-model"
  },
  "processing_ms": 7.68,
  "rejected_count": 0,
  "rejected_detections": [],
  "unfiltered_count": 1
}

recording_snapshot_frame

Frame 8 · 1.50s

Input ALPR input
Full Frame Full frame
Count 0 Unfiltered 0 No candidate

Service Payload

Sanitized ALPR response for this attempt.

 
{
  "annotated": true,
  "annotated_image_base64": "\u003comitted\u003e",
  "count": 0,
  "detections": [],
  "filter": {
    "accept_short_dateless": false,
    "country": "United Kingdom",
    "method": "model_country_match_plus_uk_format_validation",
    "min_valid_plate_len": 5,
    "strict_uk_plate_validation": true
  },
  "model": {
    "detector": "yolo-v9-t-384-license-plate-end2end",
    "detector_conf_thresh": 0.4,
    "ocr": "cct-s-v2-global-model"
  },
  "processing_ms": 5.88,
  "rejected_count": 0,
  "rejected_detections": [],
  "unfiltered_count": 0
}