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http://hdl.handle.net/2445/186323
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DC Field | Value | Language |
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dc.contributor.advisor | Prats Soler, Martí | - |
dc.contributor.advisor | Roca Cánovas, Raúl | - |
dc.contributor.author | Dı́az Cancer, Tània | - |
dc.date.accessioned | 2022-06-07T07:52:56Z | - |
dc.date.available | 2022-06-07T07:52:56Z | - |
dc.date.issued | 2022-01-24 | - |
dc.identifier.uri | http://hdl.handle.net/2445/186323 | - |
dc.description | Treballs Finals de Grau de Matemàtiques, Facultat de Matemàtiques, Universitat de Barcelona, Any: 2022, Director: Martí Prats soler i Raúl Roca Cánovas | ca |
dc.description.abstract | [en] In this work it has been designed a steganographic method for embedding watermarks in invisible digital images based on the Fourier transform and resistant to the printing and scanning process. The objective of this method is to facilitate the tracking of possible leakage points or filtration of private documents. The water- mark is embedded over the magnitude coefficients of the Fourier transform. The measure Peak signal-to-noise ratio is used to evaluate the degradation of the image quality after marking. A detection rate is defined to check the resistance of the watermark to different geometric attacks and, finally, to the printing and scanning process. | ca |
dc.format.extent | 56 p. | - |
dc.format.mimetype | application/pdf | - |
dc.language.iso | cat | ca |
dc.rights | cc-by-nc-nd (c) Tània Dı́az Cancer, 2022 | - |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/es/ | * |
dc.source | Treballs Finals de Grau (TFG) - Matemàtiques | - |
dc.subject.classification | Transformacions de Fourier | ca |
dc.subject.classification | Treballs de fi de grau | - |
dc.subject.classification | Xifratge (Informàtica) | ca |
dc.subject.classification | Filigranes | ca |
dc.subject.classification | Anàlisi harmònica | ca |
dc.subject.other | Fourier transformations | en |
dc.subject.other | Bachelor's theses | - |
dc.subject.other | Data encryption (Computer science) | en |
dc.subject.other | Watermarks | en |
dc.subject.other | Harmonic analysis | en |
dc.title | Transformades de Fourier aplicades a marcatge invisible d’imatges digitals | ca |
dc.type | info:eu-repo/semantics/bachelorThesis | ca |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | ca |
Appears in Collections: | Treballs Finals de Grau (TFG) - Matemàtiques |
Files in This Item:
File | Description | Size | Format | |
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tfg_diaz_cancer_tania.pdf | Memòria | 7.43 MB | Adobe PDF | View/Open |
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