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Title: Digital Watermarking Menggunakan Metode Discrete Cosine Transform
Authors: Winarso M.E., Sri
Keywords: watermarking algorithm;DCT (Discrete Cosine Transform);randomness
Issue Date: Feb-2007
Publisher: Fakultas Teknologi Informasi UKSW
Abstract: Due to good randomness and easy reproduction of chaos, the watermark is firstly permuted by the hashed chaotic sequence. Then a small number of reference points are randomly selected in the middle frequency bands of the DCT domain based on the chaotic sequences. After that, the batch-type of disorder watermark bits are embedded into the neighborhood of every reference point using odd-even quantization. The usefulness of multilevel chaotic keys and privacy of modification to frequency coefficients enhance the security of watermark information.
Description: Aiti : Jurnal Teknologi Informasi, Vol. 4, No. 1, Februari 2007, p. 72-85
ISSN: 1693-8348
Appears in Collections:Aiti 2007 Vol. 4 No. 1 Februari

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