CL2021000699A1 - System and method of automatic identification of photocopied documents - Google Patents
System and method of automatic identification of photocopied documentsInfo
- Publication number
- CL2021000699A1 CL2021000699A1 CL2021000699A CL2021000699A CL2021000699A1 CL 2021000699 A1 CL2021000699 A1 CL 2021000699A1 CL 2021000699 A CL2021000699 A CL 2021000699A CL 2021000699 A CL2021000699 A CL 2021000699A CL 2021000699 A1 CL2021000699 A1 CL 2021000699A1
- Authority
- CL
- Chile
- Prior art keywords
- document
- photocopied
- obtaining
- image
- automatic identification
- Prior art date
Links
Landscapes
- Editing Of Facsimile Originals (AREA)
Abstract
Sistema y método de identificación automática de documentos fotocopiados. El método comprende: capturar (202) una imagen (112) de un documento impreso marcado (102); descifrar (204) una marca de agua digital embebida en la imagen (112), obteniendo un identificador de marca (206); recuperar, mediante consulta (208) a una base de datos (306), al menos un parámetro de calibración asociado al identificador de marca (206); aplicar (214) una transformada de Fourier discreta sobre la imagen, obteniendo una matriz de frecuencias (216); obtener (222) al menos un valor máximo de frecuencia (224) en la matriz de frecuencias (216); comparar (226) el al menos un valor máximo de frecuencia (224) con al menos un parámetro de calibración; determinar (228), en base a dicha comparación, si el documento impreso marcado (102) es un documento original (124) o un documento fotocopiado (126). El método identifica un documento fotocopiado sin la pérdida de la marca de agua digital, manteniendo la trazabilidad del documento durante toda su vida útil.System and method of automatic identification of photocopied documents. The method comprises: capturing (202) an image (112) of a marked printed document (102); decrypting (204) a digital watermark embedded in the image (112), obtaining a brand identifier (206); retrieving, by querying (208) to a database (306), at least one calibration parameter associated with the brand identifier (206); applying (214) a discrete Fourier transform on the image, obtaining a frequency matrix (216); obtaining (222) at least one maximum frequency value (224) in the frequency matrix (216); comparing (226) the at least one maximum frequency value (224) with at least one calibration parameter; determining (228), based on said comparison, whether the marked printed document (102) is an original document (124) or a photocopied document (126). The method identifies a photocopied document without the loss of the digital watermark, maintaining the traceability of the document throughout its useful life.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CL2021000699A CL2021000699A1 (en) | 2021-03-22 | 2021-03-22 | System and method of automatic identification of photocopied documents |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CL2021000699A CL2021000699A1 (en) | 2021-03-22 | 2021-03-22 | System and method of automatic identification of photocopied documents |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CL2021000699A1 true CL2021000699A1 (en) | 2021-09-24 |
Family
ID=77999501
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CL2021000699A CL2021000699A1 (en) | 2021-03-22 | 2021-03-22 | System and method of automatic identification of photocopied documents |
Country Status (1)
| Country | Link |
|---|---|
| CL (1) | CL2021000699A1 (en) |
-
2021
- 2021-03-22 CL CL2021000699A patent/CL2021000699A1/en unknown
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