In this section, the discrete transform ridge redundant wavelet transform, dyadic wavelet transform, curvelet transformation, curvelet transformation have been introduced.
在这一部分分别介绍了冗余变换中的离散脊波变换、二进小波变换、曲波变换、快速曲波变换。
One of the most common digital-signal-processing techniques is the discrete Fourier transform (DFT), which breaks a signal into its component frequencies and can be represented as a matrix.
最常见的数字信号处理技术之一是离散傅立叶变换（DFT），它把一个信号分解成它的组成频率，并表示成一个矩阵。
The discrete Fourier Transform of the variables is computed with the FFT of fixed points.
求变数的离散富氏变换用固定点数的FFT，节省了计算时间。
Then it tells the knowledge of image compression. It introduces some methods of discrete quartered transform.
然后介绍了图像压缩的有关知识，讲述了离散正交变换的几种方法。
Data correlation coefficients were calculated and switch regions were analyzed by using two dimension discrete cosine transform (DCT) in ray-space data compression.
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。
This paper analyzed the characteristic of noise in hyperspectral data deeply, and puts forward a de-noising method based on stationary discrete wavelet transform (SDWT).
文章深入分析了高光谱遥感数据中噪声的特点，提出了一种基于平稳小波变换的改进小波滤噪算法。
A new method for predetermination of all-zero blocks in low rate video coding is proposed, which is based on characters of discrete cosine transform (DCT) and quantization.
该文根据离散余弦变换(DCT)和量化运算的特点，提出了一种新的用于低比特率视频编码的全零块预先判别方法。
A watermarking scheme based on the discrete cosine transform (DCT) was studied. A new blind watermarking algorithm by embedding the watermark into the phase components of DCT was proposed.
基于离散余弦变换(DCT)方法对水印算法进行了研究，提出一种新的将水印嵌入到分块dct相位成分的盲水印算法。
Arbitrary shape region of interest lossily and losslessly coding technology based on integer-to-integer shape adaptive discrete wavelet transform has also been studied.
研究了基于整数到整数形状自适应离散小波变换对任意形状感兴趣区域的有损和无损编码技术。
It is a new method that calculate vertical second derivative of gravity anomalies based on discrete cosine transform (DCT).
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。
The matched filtering method based on discrete cosine transform can improve accuracy and reliability of dividing gravitational and magnetic anomaly.
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。
Variable characteristics were captured in discrete cosine transform (DCT) domain of JPEG images and from their decompressed versions with these functions.
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。
So the fast algorithms of discrete sine transform, the discrete cosine transform and the discrete W transform are unified.
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。
The Discrete Fourier Transform (DFT) plays an important role in digital signal processing and many other fields.
离散傅里叶变换（DFT）在数字信号处理等许多领域中起着重要作用。
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。
Two approaches, single decomposition approach and multi-decomposition approach, using discrete wavelet transform for extracting phase in phase profilometry are proposed.
提出了两种在相位轮廓术中使用离散小波变换提取条纹相位的方法：单次分解法和多次分解法。
The results indicate that the discrete cosine transform has a good compressibility to NIR spectra of tea.
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 fourth order Runge-Kutta method is used to transform the mathematics model into discrete simulation model, using MATLAB7.0 simulation software to simulate its dynastic performance.
采用了四阶龙格-库塔算法，将数学模型转换为可仿真的离散模型，并利用MATLAB7.0对其进行了计算机仿真。
This algorithm is based on two dimensional discrete Fourier transform (2dft).
该水印算法基于二维离散傅立叶变换(2dft)。
The standard method for spectrum analysis in digital signal processing is the discrete Fourier transform(DFT), typically implemented using a fast Fourier transform(FFT) algorithm.
数字信号处理中标准的频谱分析方法是离散傅立叶变换（DFT），典型的实现方法是快速傅立叶变换（FFT）。
Then according to the properties of discrete Fourier transform, it deduces the discrete Fourier invariant features that are employed on facial image recognition.
依据离散傅里叶变换性质，推导出离散傅里叶变换的不变特征，并将其用于人脸图像识别。
The improved AFT algorithms for even and odd functions can also be used for computing discrete cosine transform (DCT) and discrete sine transform (DST), respectively.
本文改进的偶函数和奇函数的AFT算法还分别可以用来计算离散余弦变换(DCT)和离散正弦变换(DST)。
Compared with JPEG, JPEG 2000 made substantial improvements, the most important of which is discrete wavelet transform (DWT) instead of the JPEG standard discrete cosine transform.
与jpeg相比，JPEG 2000作了大幅改进，其中最重要的是用离散小波变换(DWT)替代了JPEG标准中的离散余弦变换。
Starting from continuous Fourier transform, the properties of continuous Fourier transform are discussed, and the paper gives the properties of discrete Fourier transform.
从连续傅里叶变换出发，讨论连续傅里叶变换情况下的傅里叶变换性质，给出离散傅里叶变换情况下的傅里叶变换性质。
The discrete Fourier transform (DFT) and discrete Hartley transform (DHT) can be considered as special cases of DYT.
常用的离散傅里叶变换(DFT)、离散哈特莱变换(DHT)均可视为DYT的特例。
The paper presents a method of motion curve frequency domain filtering in Omni-directional M-mode echocardiography images based on Discrete Fourier Transform (DFT).
介绍一种基于离散傅里叶变换(DFT)的全方向M型超声心动图运动曲线频域滤波技术。
By studying three dimensional discrete wavelet transform (3d DWT) core algorithm in deepness, the paper divides it into three one dimensional discrete wavelet transforms (1d DWT).
通过深入研究三维离散小波变换(3dDWT)核心算法，将其分解为3个一维的小波变换(1d DWT)。
This paper discusses the feature of redundant discrete wavelet transform and proposes an irregular triangular mesh design method in wavelet domain for motion compensation in wavelet video codec.
在深入研究视频图像冗余离散变换特征的基础上，提出一种用于视频编码运动补偿技术的小波域不规则三角形网格构造方法。
The discrete cosine transform (DCT) is an important mathematical tool in digital image processing and many other fields.
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。
Discrete cosine transform (DCT) is a hypo-optimal transform approach similar to KL transform.
DCT变换是一种与KL变换非常相似的次最优变换算法。
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