Copyright Protection of Color Imaging Using Robust-Encoded Watermarking
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Date
2015-04
Authors
Cedillo-Hernandez, Manuel
Cedillo-Hernandez, Antonio
Garcia-Ugalde, Francisco
Nakano-Miyatake, Mariko
Perez-Meana, Hector
ORCID
Advisor
Referee
Mark
Journal Title
Journal ISSN
Volume Title
Publisher
Společnost pro radioelektronické inženýrství
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Abstract
In this paper we present a robust-encoded watermarking method applied to color images for copyright protection, which presents robustness against several geometric and signal processing distortions. Trade-off between payload, robustness and imperceptibility is a very important aspect which has to be considered when a watermark algorithm is designed. In our proposed scheme, previously to be embedded into the image, the watermark signal is encoded using a convolutional encoder, which can perform forward error correction achieving better robustness performance. Then, the embedding process is carried out through the discrete cosine transform domain (DCT) of an image using the image normalization technique to accomplish robustness against geometric and signal processing distortions. The embedded watermark coded bits are extracted and decoded using the Viterbi algorithm. In order to determine the presence or absence of the watermark into the image we compute the bit error rate (BER) between the recovered and the original watermark data sequence. The quality of the watermarked image is measured using the well-known indices: Peak Signal to Noise Ratio (PSNR), Visual Information Fidelity (VIF) and Structural Similarity Index (SSIM). The color difference between the watermarked and original images is obtained by using the Normalized Color Difference (NCD) measure. The experimental results show that the proposed method provides good performance in terms of imperceptibility and robustness. The comparison among the proposed and previously reported methods based on different techniques is also provided.
Description
Citation
Radioengineering. 2015 vol. 24, č. 1, s. 240-251. ISSN 1210-2512
http://www.radioeng.cz/fulltexts/2015/15_01_0240_0251.pdf
http://www.radioeng.cz/fulltexts/2015/15_01_0240_0251.pdf
Document type
Peer-reviewed
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Published version
Date of access to the full text
Language of document
en