DCT based robust watermarking technique is to adjust the DCT coefficient to watermark.
基于DCT变换的鲁棒性水印方法是通过调整dct系数来嵌入水印信息的。
The calculation of frequency data is converted to 2(N-1) calculations of even- or odd-indexed N-length 1D-DCT coefficient.
将对频域的计算转换为对2（N-1）个N点1维素数尺寸DCT的奇系数或偶系数的计算；
The meaningful gray image is serially processed into watermark signal and embedded into the DC elements of the block DCT coefficient matrix of the host image.
该算法是先对有意义的灰度图像进行水印序列化处理后，再将其作为水印信号嵌入到载体图像的分块DCT系数直流分量里。
Using this conclusion and considering the characteristic of grating projective images, the paper creates the 0-1 value mask to compress the DCT coefficient matrix.
利用此结论创建用于压缩的二值掩模矩阵，并对光栅投影图之一的位相图进行基于离散余弦变换的压缩。
It is proved that for a image subblock with a single straight edge, the DCT coefficient. energy compaction orientation and the spatial edge orientation are not always orthogonal.
通过理论推导及事例分析证得含平直单边缘图像子块，其DCT变换系数能量并不总是集中分布在与其空间边缘走向垂直的方向上。
Based on the Discrete Cosine Transform (DCT) coefficient histogram difference sequences of JPEG images, a new steganalytic method was proposed to realize the steganalysis of JPEG MB2.
基于JPEG图像的离散余弦变换（DCT）系数直方图差值序列，提出一种新的检测JPEGMB2隐写术的方法。
At the same time, the algorithm is combined with the video compressing standards, and embeds the information in the coefficient of the sub-low frequency in DCT domain, which improves the robustness.
同时算法与视频压缩算法相结合，在DCT域的次低频系数中嵌入信息，提高其鲁棒性。
According to the characteristics of integer discrete cosine transformation(DCT) and quantization, the coefficient-all-zero block was determined in advance to terminate meaningless search.
根据整数DCT变换和量化的特性，通过提前判定全零系数块来终止没有意义的运动搜索过程。
According to the characteristics of integer discrete cosine transformation(DCT) and quantization, the coefficient-all-zero block was determined in advance to terminate meaningless search.
根据整数DCT变换和量化的特性，通过提前判定全零系数块来终止没有意义的运动搜索过程。
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