1) hierarchical DCT
层次余弦变换
2) Layered DCT
层式余弦变换
1.
Digital Watermarking Using Visual Model Weights in the Layered DCT;
基于层式余弦变换和视觉特征的数字水印隐藏方法
2.
Experimental results show the layered DCT domain has high capacity which means the watermark is robust to several attack like JPEG coding.
提出基于层式余弦变换的隐藏水印方法 ,主要思路是在余弦变换的 DC系数和 AC系数中叠加水印信号频率值 ,这是因为 DC系数与 AC系数空间容量充足 ,故能保证水印的稳健性 。
3) Cosine transform
余弦变换
1.
Improved cosine transform profilometry for the automatic measurement of 3-D objcet shapes;
余弦变换三维物体轮廓术的改进
2.
Using cosine transform for forward modeling and inversion of gravitational anomaly on density interface.;
基于余弦变换的密度界面重力异常正反演研究
3.
Research on sine and cosine transform of broad sense Fourier
广义Fourier正弦、余弦变换研究
4) discrete cosine transform
余弦变换
1.
And it also uses discrete cosine transform to data compression.
通过余弦变换进行数据压缩 ,作为神经网络的输入量进行轴心轨迹的自动识别 ,使得系统在较少输入维数的前提下获得比较高的系统自动识别率 。
2.
Firstly the original image is first-level discrete wavelet transformed,the first level low frequency coefficients are discrete cosine transformed,and then DCT mid-frequency coefficients are adjusted in which pseudorandom number sequences ({-1,1})are embedded.
提出了一种基于小波变换和余弦变换的鲁棒水印算法 。
5) DCT
余弦变换
1.
Thirdly,a characteristic vector of the image is acquired using a dis- crete cosine transform(DCT).
在水印嵌入部分:首先对宿主图像进行小波分解、嵌入水印,再通过余弦变换求得该水印图像的一个特征向量,利用该特征向量和水印信息通过HASH函数生成一个二值逻辑系列,将该序列作为密钥;水印提取部分为:对待测的图像进行小波变换,再通过余弦变换求得待测图像的一个特征向量,利用该特征向量和密钥通过HASH函数提取出水印。
2.
An improved discrete cosine transform-LMS (DCT-LMS) adaptive algorithm is used to cancele coloured noises in phoning.
为便于用低成本的高速信号处理芯片实现语音降噪 ,对改进的离散余弦变换域 LMS( Discrete cosinetransform-LMS)自适应算法应用于噪声抵消系统进行了实验研究。
6) cosine transform spectrum
余弦变换谱
1.
Formulas of inversion and cosine transform spectrum of gravity anomaly of sphere,infinite horizontal cylinder,infinite and finite stretched staircase were deduced.
推导出球体、无限长水平圆柱体、无限和有限延伸垂直台阶的重力异常余弦变换谱及反演表达式。
2.
We proposed and proved three theorems through which the theoretical formula of cosine transform spectrum of gravity anomalies of the point mass and the vertical rectangular-cylinder was deduced in order to obtain the general equation of gravity anomalies.
为获得重力异常余弦变换谱的通式,提出并证明了3个定理;利用它们推导了点质量和直立矩形柱体的重力异常余弦变换谱理论公式,同时给出了重力异常余弦变换谱通式。
补充资料：Fourier余弦变换
Fourier余弦变换
Fourier cosine transform
I议耐台余弦变换[I饭川份仪d理加田北而;Koc皿yc一uPe-o6pa”。a.e巾yp‘e] 见I议州匕变换(Fou〔屺rtla瑙form).
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条