Exact(8)
Therefore, this study used smoothness to distinguish the types of image blocks, and employ different watermark embedding, tamper detection, and recovery strategies for different block types to enhance hiding efficiency, authentication, and recovery effects.
The actions for encoder player are V j (s1,...s N ) where s1,...s N are different watermark weightings of 0.0, 0.2,...2,..., 1.0 for β λ,θ.
To have a complete comparison between proposed method and related ones, we embedded the 50 different watermark images in three sizes (, and ) in 50 selected images in two sizes ( and ) and obtained watermarked images.
Here the actions for encoder player are V i (s1,...,s N ) where s1,...s N are different watermark weightings of 0.0, 0.2,...2,..., 1.0 for β λ,θ.
Interestingly, the new embedding strategy we introduced can also be extended in many directions, including using other quantization modulation techniques, defining a different watermark detection region, selecting a different objective function for optimization, and proposing more practical implementations for applications, which are good directions for future work.
Also, based on experiments on different watermark images (with size and ), the value of was selected equal to 4. The program development tool was MATLAB and the computation platform was a personal computer with 1.66 GHZ of CPU and 2 GB of RAM. Figure 10 (a) Original Lena image, (b) Original Baboon image, (c) Original Peppers image and (d) Original Crowd image.
Similar(52)
SDMI provided three sample files: an unwatermarked song, the same song with a watermark added, and a different watermarked song.
In this paper, a novel adjusted-purpose digital watermarking technique is presented to simplify the selection and to integrate different watermarking techniques.
In practice, there exists a fundamental trade-off between the different watermarking requirements.
The hybrid approach with different watermarking schemes can further be divided into two classes: independent scheme and dependent scheme.
There may be some variants of such an embedding scheme (depending upon different watermarking properties like 'blindness', 'robustness', etc).
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