Secondly, based on applying the pre-quantization theory, the watermark is embedded in AC coefficients in DCT domain, which can get the original watermark after image compression.
其次,本文在应用预量化原理的基础上,将提取出的水印信息嵌入到DCT交流系数中,使得图像在压缩后水印信息可以完全重构。
参考来源 - 基于数字水印的图像认证技术研究·2,447,543篇论文数据，部分数据来源于NoteExpress
In this paper, we propose a matching criterion for block-matching motion estimation based on the statistic distribution of DCT AC coefficients.
根据运动估计的残差图像的DCT变换后交流系数的统计分布规律，推导出了一种块匹配运动估计的匹配准则。
The ac coefficients of an image's Discrete Cosine Transform (DCT) are best approximated by Laplacian distribution 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。
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。
应用推荐