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b Creating rooms for data hiding.
We proposed the (1,7,4) scheme for data hiding.
Let the pixels in red serve as the reference points for data hiding.
In practice, due to different desired properties, different transform domains could be used for data hiding.
This approach was the first instance of using the error correcting code for data hiding.
The popularity and easy accessibility of the JPEG image format is becoming a great area of research for data hiding.
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We employ the three-layer pyramid for reversible data hiding.
Prediction error which means difference between the original pixel and the predicted pixel is expanded for reversible data hiding.
With the descriptions above, we can find that reversibility can be guaranteed by manipulating difference histogram for reversible data hiding.
There are two significant criterions for reversible data hiding techniques: the embedding capacity should be large while the distortion should be low.
Probability distribution function of the prediction errors is sharper and narrower than that of the simple difference of the pixel values, which is better for reversible data hiding.
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