Abstract
Most of the existing image data hiding methods have little payload and the visual effect is usually not good enough.The paper proposed a reversible hiding technique based on prediction-error and histogram pair.The gray value of a pixel was predicted using eight pixels around it in a multi-gray image.Then the prediction-error could be calculated.The hiding data were embedded into the prediction-error with the technique of histogram pair.An embedded threshold and an undulating threshold were selected during embedding,and adjusting the pair of thresholds achieved the best performance.The experimental results have demonstrated the proposed method obtains good performance both in embedding payload and visual quality.
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