Hybridization of DCTune and psycho-visual saliency model to improve security and capacity in DCT based image watermarking

Authors:
Apurba Das;S. Kavitha
Affiliations:
HCL Technologies Ltd., Chennai, India;HCL Technologies Ltd., Chennai, India
Venue:
Proceedings of the Fifth International Conference on Security of Information and Networks
Year:
2012

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Abstract

Watermarking in images is necessary for authentication of digital library based applications, mostly. For efficient utilization of storage space and bandwidth of communication channel, compressed images ensuring fair amount of quality is employed. In our method we have addressed compressed images and found relatively redundant DCT coefficients for data embedding with maximized capacity. Here the concept of psycho-visual saliency and DCTune is combined to judge the capacity of each region of an image and the interpretation of saliency in frequency domain is exploited to ensure the watermarking technique adaptive.