A BLIND IMAGE WATERMARKING TECHNIQUE USING MOST FREQUENT WAVELET COEFFICIENTS

摘要

Watermarking in multimedia contents has attracted lots of attention in the research society. In thisapproach wavelet based blind image watermarking technique is proposed, initially original image isundergoing a single level decomposition using wavelet transform. From the approximation band, remove thedecimal part of the most repeated integer part. Now, secret information is multiplied by the scaling factorwhich provides embedding strength. Further, it is added to the repeated values of wavelet coefficients, thewatermarked image is obtained by applying the inverse wavelet transform. To prove the ownership extract thewatermark by identifying the most frequent coefficients of the single level decomposition of watermarkedimage. Simulation results displays that the proposed approach can withstand the noise and filtering attackswith a good invisibility and robustness.