{
  "plagiarism_detection_performance": {
    "model": "O2O Triple-Similarity Detector",
    "engine_version": "o2o-plagiarism-2.0.0-pdf-v1.2",
    "test_dataset": {
      "total_samples": 1000,
      "plagiarism_cases": 500,
      "non_plagiarism_cases": 500
    },
    "confusion_matrix": {
      "true_positive": 493,
      "false_positive": 8,
      "true_negative": 492,
      "false_negative": 7
    },
    "performance_metrics": {
      "precision": 0.984,
      "recall": 0.986,
      "f1_score": 0.985,
      "accuracy": 0.985
    },
    "threshold": {
      "combined_similarity": 0.65,
      "min_exact_span_chars": 35,
      "min_coverage": 0.3,
      "require_exact_span_evidence": true
    },
    "interpretation": {
      "precision": "모델이 표절로 판단한 501건 중 493건(98.4%)이 실제 표절",
      "recall": "실제 표절 500건 중 493건(98.6%)을 정확히 탐지",
      "false_positive_rate": "1.6%"
    }
  }
}