基于线性预测的图像无损信息隐藏方法
Lossless Data Hiding Method in Image Based on Linear Prediction
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摘要: 对Thodi算法(Thodi D M, Rodrfguez J J. Reversible watermarking by prediction-error expansionC// Proceedings of the 6th IEEE Southwest Symposium on Image Analysis and Interpretation, Lake Tahoe, Nevada, 2004: 21-25)进行了预测误差算法和嵌入/提取算法2方面的改进.较好地实现了大数据量信息在图像中的隐秘传输,使提取隐藏数据后能无损恢复原图像.该方法已用于将病人信息隐藏在医学图像中,使得藏有信息的图像在传输过程中出现噪声或丢失信息时,仍可较好地从中提取病人信息;亦可用于遥感、军事图像的隐秘传输等领域.Abstract: In this paper an improvement is made to Thodi algorithm （Thodi D M,Rodrfguez J J.Reversible watermarking by prediction-error expansion［C］//Proceedings of the 6th IEEE Southwest Symposium on Image Analysis and Interpretation,Lake Tahoe,Nevada,2004：21－25） in two aspects：predictive error algorithm and embedding/extracting algorithm were promoted.It can be employed to secret transmission of a large amount of hidden information in image,where the original host image from the embedded image could still be retrieved after the hidden data is extracted.The method has been applied to hiding case history information in medical image where the case history information can still be extracted even when noise occurred or some information is lost.The method can also be used for secret information transmission in remote-sensing,military image etc.
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