cross_field_consistency_checker

Verificar coherencia entre campos MRZ y zona visual del documento para detectar falsificaciones

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Install skill "cross_field_consistency_checker" with this command: npx skills add davidcastagnetoa/skills/davidcastagnetoa-skills-cross-field-consistency-checker

cross_field_consistency_checker

Compara los datos extraídos de la MRZ con los datos de la zona de lectura visual (VIZ) del documento. Las discrepancias detectan documentos manipulados donde se ha modificado solo una zona.

When to use

Usar después de obtener resultados de paddleocr y mrz_parser para validar coherencia.

Instructions

  1. Normalizar campos antes de comparar: quitar acentos, convertir a mayúsculas, limpiar caracteres especiales.
  2. Comparar: document_number_mrz vs document_number_viz.
  3. Comparar: birth_date_mrz vs birth_date_viz (normalizar formato de fecha).
  4. Comparar: expiry_date_mrz vs expiry_date_viz.
  5. Comparar: name_mrz vs name_viz (usar distancia de Levenshtein para tolerancia a errores OCR; umbral ≤2).
  6. Calcular score de consistencia: n_matching / n_total_fields.
  7. Si score < 0.7: emitir flag DOCUMENT_INCONSISTENCY al antifraud_agent.
  8. Documentar qué campos divergen en el evento de auditoría.

Notes

  • Distancia de Levenshtein: pip install python-Levenshtein.
  • Pequeñas diferencias pueden ser errores OCR; el contexto de múltiples discrepancias es lo relevante.

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