CL2021000699A1 - System and method of automatic identification of photocopied documents - Google Patents

System and method of automatic identification of photocopied documents

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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
Application number
CL2021000699A
Other languages
Spanish (es)
Inventor
Utiel Armando Muñoz
García David González
Original Assignee
Sotec Consulting S L
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sotec Consulting S L filed Critical Sotec Consulting S L
Priority to CL2021000699A priority Critical patent/CL2021000699A1/en
Publication of CL2021000699A1 publication Critical patent/CL2021000699A1/en

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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.

CL2021000699A 2021-03-22 2021-03-22 System and method of automatic identification of photocopied documents CL2021000699A1 (en)

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)

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