1.On the basis of analysis and evaluation of DCT (Discrete Cosine Transform) and order cumulates non-watermarking, a new non-watermarking based DWT (Discrete Wavelet Transform) is presented in order to improve the robustness of non-watermarking.
在对目前基于离散余弦变换DCT(Discrete Cosine Transform)变换域和高阶累积量的零水印算法作详细分析和评价的基础上,为了进一步提高零水印的鲁棒性,提出了一种新的基于离散小波变换域DWT(Discrete Wavelet Transform)的零水印方案。
2.Meanwhile, many video compression standards such as MPEG-1 and MPEG-2 employ DCT(Discrete Cosine Transform) and IDCT(Inverse Discrete Cosine Transform) in coding and decoding.
同时，许多视频压缩标准如MPEG-1和MPEG-2等均采用离散余弦变换(DCT: Discrete Cosine Transform)及离散余弦反变换(IDCT: Inverse Discrete Cosine Transform)进行编解码。
3.The thesis mainly uses the program named transform and tool of DTS provided by Microsoft to create new fields in tables of source data and transform these tables to MS SQL Server.
在数据抽取和导入方面，本文主要通过作者编写的DTS程序transform在数据源表中生成新的指标字段，同时利用微软提供的DTS工具将数据源表导入MS SQLServer中。
4.The English Ontology described by RDF was analyzed by Jena, and the transform, java program used to transform English Ontology into Chinese-English Ontology was designed and realized.
设计了一个类图的遗历Transform. java程序,实现了英文Ontology到汉英Ontology的转换。
5.Combining the symmetry principle of DFT(Discrete Fractional Fourier Transform) operation with even numbers,expands the one-dimensional symmetry principle in MA-CDFRFT algorithm to the two-dimensional plane of frequency and transform the order according to the mathematical derivation.
结合偶数点离散傅里叶变换DFT(Discrete Fourier Transform)运算的对称性原理,通过数学推导将MA-CDFRFT算法中的一维对称性扩展到频率和变换阶数的二维平面上.
6.DCT is based on FFT (Fast Fourier Transform), so integers FFT transform must be structured firstly.
DCT变换采取基于FFT(fast Fourier transform)的快速算法，所以，首先寻找整数FFT变换。
7.The MA-CDFRFT(Multiangle Centered Discrete Fractional Fourier Transform) algorithm which is based on the eigendecomposition of the centered version DFT matrix makes full use of the FFT operation to reduce the computations in computing a group of DFRFT operations.
基于中心类型DFT矩阵特征分解的MA-CDFRFT(Multiangle Centered Discrete Fractional Fourier Transform)算法在计算一组离散分数阶傅里叶变换DFRFT(Discrete Fractional Fourier Transform)时充分利用FFT运算来减小运算量.
8.Spacial derivation using Hartley Transform in simulating 2D interborehole acoustic wave equation needs less internal storage but causes one time faster computation than Fast Fourier Transform.
在二维跨井声波波动方程正演模拟中,采用哈特莱变?Q(Hartley Transform)求取空间导数,具有占用内存比FFT少.
9.The assessment of experimental results from subjective visual effect and objective statistical analysis indicates that the proposed scheme has better performance in preserving the spectral characteristics of the multispectral images,while improving the spatial resolution,than the conventional image fusion methods such as the methods based on HIS(hue-intensity-saturation) transform,PCA,and wavelet transform(WT).
实验结果的主观视觉效果和客观统计参数分析都表明,新方法不仅较大地增强了融合图像的空间细节表现能力,而且很好地保留了多光谱图像的光谱信息,其性能优于现有的HIS(hue-intensity-saturation)变换融合方法、PCA融合方法和小波变换(wavelet transform,WT)融合方法。
10.In this paper,a digital image compression algorithm is researched. This algorithm is based on DCT(Discrete Cosine Transform)and SPIHT(Set Partitioning in Hierarchical Trees). Experimental results show that this algorithm can achieve a similar effect like that of JPEG,even a better effect than that of JPEG.
研究基于离散余弦变换DCT(Discrete Cosine Transform)与多级树集合分裂算法SPIHT(Set Partitioning in Hierarchical Trees)的数字图像压缩技术,实验结果显示,该技术能够取得与JPEG标准相近甚至更优的压缩效果。
