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Robustness of a DFT Based Image Watermarking Method Against AM Halftoning (CROSBI ID 170968)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Poljičak, Ante ; Mandić, Lidija ; Agic, Darko Robustness of a DFT Based Image Watermarking Method Against AM Halftoning // Tehnički vjesnik : znanstveno-stručni časopis tehničkih fakulteta Sveučilišta u Osijeku, 18 (2011), 2; 161-166

Podaci o odgovornosti

Poljičak, Ante ; Mandić, Lidija ; Agic, Darko

engleski

Robustness of a DFT Based Image Watermarking Method Against AM Halftoning

In this paper the robustness of a Discrete Fourier Transform (DFT) based image watermarking scheme to amplitude modulation (AM) halftoning is evaluated. Halftoning is used for reproduction of continuous images. Thus, it is important that a watermarking method is robust to halftoning. Three different shapes of clustered dots of AM (Amplitude Modulation) halftones are used (round, ellipse and line) with five different halftone frequencies (10, 13, 15, 40, and 60 line/cm). The tests where done on a dataset of 1000 images. As the metric of robustness, watermark detection rate, distribution of detection values, and ROC (Receiver Operation Characteristic) curves were used. The results showed that the watermarking scheme is robust to halftoning for halftone frequencies greater than 15 line/cm. Also, the type of AM halftone used has almost no effect on a detection rate.

amplitude modulated halftoning; discrete fourier transform; image; watermark

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Podaci o izdanju

18 (2)

2011.

161-166

objavljeno

1330-3651

Povezanost rada

Grafička tehnologija, Računarstvo

Indeksiranost