A semi-blind logo watermarking scheme for color images by comparison and modification of DFT coefficients

Janusz Kusyk; Ahmet M. Eskicioglu

doi:10.1117/12.631934

24 October 2005 A semi-blind logo watermarking scheme for color images by comparison and modification of DFT coefficients

Janusz Kusyk, Ahmet M. Eskicioglu

Author Affiliations +

Proceedings Volume 6015, Multimedia Systems and Applications VIII; 60150C (2005) https://doi.org/10.1117/12.631934
Event: Optics East 2005, 2005, Boston, MA, United States

Abstract

Digital watermarking is considered to be a major technology for the protection of multimedia data. Some of the important applications are broadcast monitoring, copyright protection, and access control. In this paper, we present a semi-blind watermarking scheme for embedding a logo in color images using the DFT domain. After computing the DFT of the luminance layer of the cover image, the magnitudes of DFT coefficients are compared, and modified. A given watermark is embedded in three frequency bands: Low, middle, and high. Our experiments show that the watermarks extracted from the lower frequencies have the best visual quality for low pass filtering, adding Gaussian noise, JPEG compression, resizing, rotation, and scaling, and the watermarks extracted from the higher frequencies have the best visual quality for cropping, intensity adjustment, histogram equalization, and gamma correction. Extractions from the fragmented and translated image are identical to extractions from the unattacked watermarked image. The collusion and rewatermarking attacks do not provide the hacker with useful tools.

Citation Download Citation

Janusz Kusyk and Ahmet M. Eskicioglu "A semi-blind logo watermarking scheme for color images by comparison and modification of DFT coefficients", Proc. SPIE 6015, Multimedia Systems and Applications VIII, 60150C (24 October 2005); https://doi.org/10.1117/12.631934

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available