Watermark recovery with a DCT based scheme employing nonuniform imbedding
Proceedings of the Thirty-Fourth Southeastern Symposium on System Theory (Cat. No.02EX540) - Trang 157-161
Tóm tắt
Digital Watermarking is a highly evolving field, which involves the embedding of a digital signature under a multimedia object (image, video, audio) for the purpose of copyright protection In our paper we propose a method of embedding watermarks in still digital images in the DCT domain. A unique approach of rating the 8/spl times/8 blocks of the image DCT coefficients is proposed. The experimental results show sufficient robustness of the proposed scheme to common attacks such as cropping, and JPEG lossy compression.
Từ khóa
#Watermarking #Discrete cosine transforms #Transform coding #Image coding #Robustness #Frequency #Digital signatures #Video compression #Copyright protection #Digital imagesTài liệu tham khảo
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