Mobility

A New Watermarking Approach - Combined RW/CDMA in Spatial and Frequency Domain

Date Added: Jul 2011
Format: PDF

In this paper, the authors study some watermarking methods and the comparison result of their combination, the first one is based on the CDMA (Code Division Multiple Access) in frequency domain DWT(Discrete Wavelet Transform) noted CDMA-DWT,CDMA in DCT(Discrete Cosine Transform) noted CDMA-DCT and CDMA in Spatial Domain noted CDMASD and its aim is to verify the image authenticity whereas the second one is the reversible watermarking (the least significant bits LSB and cryptography tools) noted RW and the Reversible Contrast Mapping (RCM) its objective is to check the integrity of the image and to keep the confidentiality of the patient data.