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International Journal of Information Technology & Computer Science ( IJITCS )

Abstract :

Digital watermarking applications have been  realized in various areas. Systematic processing involving  embedding the difference between the original image value  and a widely diffused watermark value is proposed as an  effective method. The robustness of the watermark is  improved because the difference is diffused systematically  in many blocks. The embedding is done through linear transformation and quantization. A Biased-Chirp transform with asymmetry is used for the linear transformation. An effective embedding of the digital  watermark is performed on the flat part of the image by  the asymmetric effect of the biased transform. As a result,  the embeddable regions of watermarks are expanded.

Keywords :

: Security; digital media; detection; watermark;  diffusion

References :

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