Abstract
Since digital images are frequently stored and
transmmited across a communication channel in
JPEG format, a given digital image
watermarking algorithm must be robust against
JPEG compression. In this study, robustness of
various digital image watermarking algorithms
on JPEG compression was investigated. For this
purpose, two methods commonly used in the
literature called CDMA and image tiling were
applied in the spatial and frequency domains.
Two dimensional discrete cosine transform
(DCT) and discrete Fourier transform (DFT)
were used as the frequency transformations. After
extensive simulations, it was observed that
spatial domain CDMA gives the best result.
References
- Langelaar G. C., Setyawan I., Lagendijk R. L., Watermarking Digital Image and Video Data, IEEE SIGNAL PROCESSING MAGAZINE, pp. 43, September 2000.
- Moulin P., Koetter R., Data-Hiding Codes, PROCEEDINGS OF THE IEEE, Vol, 93, No. , December 2005.
- Gonzalez R. C., Richard E. W., Digital Image Processing, Second Edition, pp. 154-156, Prentice Hall, 2001.
- Gonzalez R. C., Richard E. W. Eddins S. L., Digital Image Processing Using Matlab, pp. 318- , Prentice Hall, 2004.
Sayısal Görüntü Damgalama Yöntemlerinin Jpeg Sıkıştırmasına Karşı Dayanıklılığının Karşılaştırılması
Abstract
Sayısal bir görüntü genellikle JPEG formatında saklandığından ve bir haberleşme kanalından iletildiğinden verilen bir sayısal görüntü damgalama algoritması JPEG sıkıştırmasına karşı dayanıklı olmalıdır. Bu çalışmada çeşitli sayısal görüntü damgalama algoritmalarının JPEG sıkıştırmasına karşı dayanıklılığı araştırılmıştır. Bu amaçla literatürde yaygın olarak kullanılan CDMA ve görüntü bölme teknikleri kullanılarak damgalar uzaysal ve frekans domeninde eklenmiştir. Frekans dönüşümleri olarak iki boyutlu ayrık kosinüs dönüşümü (DCT) ve ayrık Fourier dönüşümü (DFT) kullanılmıştır. Yapılan detaylı simülasyonla sonucunda piksel uzayında CDMA metodunun en iyi sonucu verdiği görülmüştür.
References
- Langelaar G. C., Setyawan I., Lagendijk R. L., Watermarking Digital Image and Video Data, IEEE SIGNAL PROCESSING MAGAZINE, pp. 43, September 2000.
- Moulin P., Koetter R., Data-Hiding Codes, PROCEEDINGS OF THE IEEE, Vol, 93, No. , December 2005.
- Gonzalez R. C., Richard E. W., Digital Image Processing, Second Edition, pp. 154-156, Prentice Hall, 2001.
- Gonzalez R. C., Richard E. W. Eddins S. L., Digital Image Processing Using Matlab, pp. 318- , Prentice Hall, 2004.
Details
| Other ID | JA37GU74KH |
|---|---|
| Journal Section | Makaleler(Araştırma) |
| Authors | |
| Publication Date | June 24, 2016 |
| Published in Issue | Year 2006 Volume: 2 Issue: 1 - Volume: 2 Issue: 1 |
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