离散余弦变换是分析图像信号的有效工具。
Discrete Cosines Transform (DCT) is an effective tool for analysis image signal.
实验结果表明该方法的编码效率优于离散余弦变换编码。
The experimental results show this method could give better coding efficiency than the traditional DCT image coding.
结果表明，离散余弦变换对近红外光谱具有较强的压缩能力。
The results indicate that the discrete cosine transform has a good compressibility to NIR spectra of tea.
本文提出了一种离散余弦变换电路VLSI实现的可测试性设计。
In this paper, a VLSI implementation method of design-for-testability for DCT is presented.
提出了一种基于数字菲涅耳全息和离散余弦变换的数字水印技术。
The digital watermark technique is proposed based on Fresnel hologram and Discrete Cosine Transform.
并采用了离散余弦转换(DCT)对其方差的波谱结构进行了讨论。
We have also studied the variance spectral configuration of the surface wind field using DCT (Discrete Cosine Transform).
离散余弦变换(DCT)是数字图像处理等许多领域的重要数学工具。
The discrete cosine transform (DCT) is an important mathematical tool in digital image processing and many other fields.
针对提高磁异常导数的计算精度，提出磁位离散余弦变换谱的分析方法。
A method of magnetic potential spectrum based on the cosine transform is proposed in order to improve the calculating accuracy of magnetic anomaly derivatives.
提出了基于DCT(离散余弦变换)增强和改进谱熵的语音端点检测方法。
In the paper, a speech endpoint detection method based on DCT (Discrete Cosine Transform) enhancement and improved spectral entropy is proposed.
这样，离散余弦、离散正弦、离散w变换快速算法就有了一个统一的格式。
So the fast algorithms of discrete sine transform, the discrete cosine transform and the discrete W transform are unified.
离散余弦逆变换是MPEG - 4视频纹理解码中运算时间开销最大的部分。
Inverse Discrete Cosine Transform takes the most of time in MPEG-4 video decoding.
图像压缩编码长期以来利用离散余弦变换(DCT)作为变换编码的主要技术。
The DCT was used as the main method of image transform coding for a long time.
就两个描述的情况提出了三种基于离散余弦变换(DCT)的多描述编码方案。
In this paper, three schemes of multiple-description coding based on DCT are proposed for the case of two descriptions.
基于DCT(离散余弦变换)的自适应水印算法因其优异的性能而被广泛地采用。
Algorithm of Image Watermarking Based on DCT had been widely used because of its excellent characteristics.
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。
At low bit rates, the block Discrete Cosine Transform (BDCT) compression methods often give rise to blocking artifacts.
基于离散余弦变换(DCT)的重力异常垂向二阶导数的计算方法是笔者提出的新方法。
It is a new method that calculate vertical second derivative of gravity anomalies based on discrete cosine transform (DCT).
本文提出的基于离散余弦变换的匹配滤波方法，可以提高重磁异常划分的精确性和可靠性。
The matched filtering method based on discrete cosine transform can improve accuracy and reliability of dividing gravitational and magnetic anomaly.
这些函数从JPEG图像离散余弦变换(DCT)域及其解压图像所在空域中提取易变特征。
Variable characteristics were captured in discrete cosine transform (DCT) domain of JPEG images and from their decompressed versions with these functions.
在基于DCT的数字水印算法中通过寻找特征区域将水印嵌入在能量最大的离散余弦系数中；
Embedded the watermark information into intermediate frequency in the DCT-based watermark algorithm by seek the feature field.
接下来它还要经过一些数学处理程序，比如小波分解，多重分辨率傅立叶分析，多相过滤，离散余弦变换等。
It is then subject to such mathematical indignities as wavelet decomposition, multi-resolution Fourier analysis, polyphase filtering and discrete cosine transformation.
该文提出了一种基于全相位逆离散余弦变换(APIDCT)内插滤波器的重采样分层编码技术。
This paper proposes a hierarchical coding technique based on the All Phase Inverse Discrete Cosine Transform (APIDCT) interpolation.
本文提出用离散余弦变换(DCT)处理器级联一个权重网络实现O -QAM系统的新方案。
In this paper, a new scheme to realize O-QAM system by means of cascading a discrete cosine transformer (DCT) and a weighting network is presented.
本文提出一种以离散余弦变换(DCT)为基础的自动相位测量方法并以实验和模拟运算进行验证。
A novel discrete cosine transform (DCT) based automated phase measurement method is proposed and verified by a simulation and experiments.
本文提出离散余弦变换(DCT)的一种新的快速算法，其特点是变换长度任意，而且采用蝶形结构。
In this paper, a new fast algorithm to calculate discrete cosine transform (DCT) with arbitrary length by means of the butterfly structure is presented.
本文基于三维离散余弦变换（3D-DCT）技术和扩频通信技术提出三维体数据鲁棒水印嵌入算法。
This paper proposes a robust watermarking algorithm for volume data based on three-dimension discrete cosine transform(3D-DCT) and spread-spectrum communication technique.
对于给定的细节较少的单色数字图象，本文给出了一种自适应的离散余弦变换(DCT)数据压缩方法。
For a given monochrome digital image with low detail, an adaptive DCT data compression method is given and compared with adaptive DPCM method.
在光线空间的数据压缩中，计算了数据的相关系数，采用二维离散余弦变换(DCT)进行了变换域分析。
Data correlation coefficients were calculated and switch regions were analyzed by using two dimension discrete cosine transform (DCT) in ray-space data compression.
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 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.
目前主要有两种变换域方法，一种是使用离散余弦变换(DCT)，另一种是使用离散小波变换(DWT)。
There are two main transform domain methods, one is to use the discrete cosine transformation (DCT); the other would be the use of discrete wavelet transforms (DWT).
该频域算法采用更常见的含信息量丰富的灰度图像作为水印，结合离散小波变换和离散余弦变换的共同优点。
The frequency domain algorithm adopts the common and information - rich gray level image as a watermark, which achieves the collaborative advantages of combining the DWT and DCT.
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