查询词典 wavelets

Multi scale decomposition of wavelets ; Bouguer gravity anomaly ; rock density ; seismic activity ; North China

小波多尺度分解；布格重力异常；介质密度；地震活动；华北地区

Furthermore, research results show that the multi-channel wavelets do well in close-grained texture image compression coding.

本文使用SPIHT算法作为压缩编码算法，但该算法并不利于发挥4-进小波所具有的优势，如何构造更为高效的压缩编码算法是将来进一步研究的内容。

Through the processing method basing on wavelets, implementing the removing noise about section gauss noise to colure full TV signal, we resolve the theory and practice problems in the processing of weak signal detection.

通过基于小波分析的处理方法，实现对彩色全电视信号一段被高斯白噪声干扰的降噪，解决微弱信号检测过程中遇到的理论和实践问题。

Multiwavelets have several advantages in comparison to scalar wavelets such as compact support, orthogonality, and symmetry are known to be important in signal processing.

目前已有的GHM二重对称小波，生成它的正交矩阵滤波器并不对称，而在图象编码中，用作分解和重构的正交矩阵滤波器具有对称性才能很好地解决边界问题。

Based on conditions on the conjugate quadrature filters constructing the orthogonal scaling function and wavelet, the orthogonal conditions were designed as an objective function which was minimized by the parameter optimization in the parameterized formula of complex conjugate quadrature filters. The compact support, symmetry, quasi-orthogonal filters and wavelets were obtained.

从构建正交尺度函数与小波的共轭正交滤波器的条件出发，把滤波器的正交条件设计成目标函数，利用共轭正交复滤波器的参数化算式进行参数优化使目标函数极小，得到紧支、对称、准正交的滤波器及其小波。

First, we smooth the tongue picture. We detect the tongue edge by wavelets and a method of which is based on color information differentiability.

首先，我们对舌象进行平滑去噪，再利用小波和基于彩色信息区分度的彩色边缘检测方法提取舌象边缘，获得舌面区域。

This paper analyzed the process of concrete component ultrasonic testing signals applying the wavelets technology and wavelet packages technology from the discomposed effect, the avoiding noise and the composition of the signal.

基于小波函数的特点，从小波分解的效果，小波降低信噪比等方面，系统地分析小波及小波包在混凝土构件超声信号检测中的应用，利用四阶 Daubechies小波函数建立了一小波消噪模型。

By using the character of biorthogonal wavelets,which have dyadic rational filter coefficients,this paper presents a fast multiplierless DWT algorithm,which is very suitable for EZW image coding.

在此基础上，针对具有二进系数的双正交小波滤波器，提出了一种适合零树编码的快速小波变换算法，此算法不但以移位代替了乘法运算，而且与使用原始滤波器系数的变换等效。

Based on the characteristic of multi resolution of wavelets analysis, a effective method for displaying any cross section from coarse to fine resolution is presented; Based on OpenGL, the paper improved Ray-Casting arithmetic and footprint arithmetic considering the characteristic of seismic data; After introducing the characteristic of geology data and the process of seismic interpretation, the paper presents a theory frame of 3D geological interpretation software and partly realize the frame.

本文首次利用小波变换实现了三维地震数据体的快速多分辨率显示；针对地震数据体的特点，提出了基于OpenGL的改进光线投影法的快速算法及改进的脚印算法；实现了地震数据体的切割、面状地质体的构造及面状构造与地震数据体的联合显示，动画效果的形成等三维地震数据体显示效果；分析了三维地质体的特点及常规地质解释过程的特点，提出了三维地学可视化软件的体系结构，并实现了其中主要功能，取得了良好的效果。

In view of the coefficients of CDF9/7 wavelet filter are irrational number, we use the trigonometric function transform to factorize the perfect restruction and the biorthogonal conditions of biorthogonal wavelets filter banks, then optimize the coefficients of the original 9/7 wavelet filter banks, consequently a novel 9/7 wavelet filter banks with binary digit coefficients can be obtained.

2针对CDF9／7小波系数为无理数的缺点，对CDF9／7小波滤波器组的完全重构条件和双正交条件进行三角基函数变换和因式分解，并对求出的小波滤波器系数进行优化设计，得到一组滤波器系数都为二进制分数的9／7双正交小波滤波器组，大大降低了离散小波变换的算法复杂度。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。