...块离散余弦变换；统计矩；支持向量机 [gap=1215]image splicing detection; digital image forensics; image quality metrics (IQMs); block discrete cosine transform(BDCT); statistical moment; support vector machine (SVM) ..
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Incorporation with the property of periodic function, encryption technology and JPEG quantification coefficient,a new blind meaningful image watermarking method based on block discrete cosine transform (DCT) AC coefficient is proposed.
该文提出了一种在分块DCT的低频交流系数中利用周期函数的性质并结合加密技术和JPEG量化系数嵌入有含义的水印图像,并可以盲检测。
参考来源 - 一种新的盲有含义水印方案·2,447,543篇论文数据，部分数据来源于NoteExpress
At low bit rates, the block Discrete Cosine Transform (BDCT) compression methods often give rise to blocking artifacts.
低比特率时，基于块离散余弦变换(BDCT)的图像压缩方法常常会引起块效应。
A major drawback of block discrete cosine transform (BDCT) is that the decoded images, especially at very low bit rates, exhibit highly noticeable blocking artifacts near the block boundaries.
为了减少低比特率时块离散余弦变换(BDCT)在块边界所出现的明显可见的方块效应，提出了一种新的DCT域的去块效应消除算法。
The block-Based Discrete Cosine Transform (BDCT) suffers from visible blocking artifacts between adjacent image blocks at low bit rates, which reduces the image visual quality.
块离散余弦变换在低比特率时其恢复图像的块边界上会出现明显可见的方块效应，从而降低了图像的视觉质量。
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