The ac coefficients of an image's Discrete Cosine Transform (DCT) are best approximated by Laplaciandistribution model. Based on this model, the blind information hiding algorithm was proposed.
基于图像离散余弦变换(DCT)交流系数的拉普拉斯分布模型,提出了一种盲提取数字图像信息隐藏算法。
2
The results of the tests show that the generalized Gaussian model is better than the Laplacian model in portraying the distribution of the AC DCT coefficients.
检验结果表明,广义高斯模型比拉普拉斯模型更准确地反映了DCT交流系数的分布。
3
There is no consensus on the distribution of the AC DCT coefficients till now. In this work, the generalized Gaussian model and the Laplacian model, which are used most widely, were studied.