查询词典 wavelet

Its properties are different from those of orthonormal wavelet bases. It is then proven that the wavelet is a two-dimensional dyadic one.

基于图象的正则变换提出了一类快速边缘检测算法，其计算复杂性是线性量阶的，可以用于计算机视觉等实时处理。

The every frame image was transformed by dyadic discrete wavelet and the characteristic of wavelet transform coefficient was analyzed. Low frequency coefficients were analyzed by fast principal component method which quoted Gram-Schmidt orthonormalization procedure in fixed-point algorithm then distilled principal component and reconstructed the low frequency coefficients. To suppress image noise, the high frequency coefficients were equated to zero.

该算法对热图像序列中的每帧图像进行二进制离散小波变换，提取出低频部分的系数；对低频系数进行改进PCA分析，通过固定点算法并引入Gram-Schmidt正交化过程求解特征向量；令高频系数为零，抑制图像的噪声。

Based on the analysis of the necessary condition for OWT,using the cascade algorithm and 2D separable wavelet transform scheme,discrete approximation sequence of scaling and wavelet functions was computed for optical implementation.

通过对光学小波变换的必要条件进行分析，采用层叠算法和二维可分离小波变换构造方法计算出了尺度和小波函数的二维离散近似序列。

In this paper algorithms based on wavelet packets for multiresolution data fusion are proposed, which are efficient and highly parallelizable. So it avoids big matrix computations, and also has effective performances without assuming wavelet coefficients to be white noises.

本文研究了小波变换的特性，提出基于小波包变换的多分辨率多传感器数据融合算法，算法不需要把小波系数当成白噪声处理，并且能够有效地降低向量和矩阵维数，减少运算，有较好的滤波性能。

And thus,the wavelet analysis has developed due to this demand, This thesis is to detect the point of signal discontinuity by wavelet transform.

小波分析正是由于这种需求而发展起来的通过小波变换来精确地检测信号发生变化的时刻，构造一个信号模型，由一个低频正弦波信号连接一个高频正弦波信号，利用小波工具可以检测出信号发生不连续的间断点的位置。

After decreasing wavelet transformation s boundary effect, the prediction law and assessment standard are put up based on the theory of climatic hierarchy and wavelet analysis.

论述了子波气候诊断中的边界效应和非周期性对趋势预报的影响，在消除子波变换边界效应基础上，将气候层次理论和子波诊断技术相结合，提出了气候多层次趋势预报法则和评判标准，最后利用若干气候资料进行了多层次趋势预报。

The technique combines wavelet processing with pseudocolor processing after improving the traditional pseudocolor processing, thus overcomes the defects of wavelet and pseudocolor processing.

在对传统的伪彩色增强技术改进的基础上，将小波分析和伪彩色两种方法有机地相结合，从而克服了这两种方法的缺陷，获得了良好的增强效果。

First:3D wavelet transform is performed to the original image sequence,and an extension of set partitioning in hierarchical trees algorithm is used to quantize the wavelet coefficients.

对原始图像序列进行时间、水平和垂直三维小波分解，并采用改进的等级树集合分区的算法对小波系数进行量化。

The main works are as follows:Firstly, in order to produce quincunx down sampling and up sampling which could form directional wavelet transform, the rotated factor matrixes is introduced based on discrete wavelet transform.

在遥感图像去除噪声的过程中提出一种软阈值映射函数，在不同尺度的高频子带图像采用不同的软阈值增益，并采用新的阈值估计算法来确定不同分辨率的高频小波系数的分布来进行图像噪声的有效抑制。

A novel multisensor images fusion algorithm is presented based on lifting quincunx wavelt. First, the lifting quincunx wavelet transform is used to perform a multiscale decomposition of each image. Then, the wavelet coefficients of fused image are constructed using multiple operators according to different fusion rules. Finally, the reconstructed image is obtained through the inverse transform.

提出了一种基於提升方案的五株形小波的多传感器图像融合方法，即在提升五株形小波多尺度分解的基础上，对每一幅图像进行多尺度分解，按照不同的融合规则和融合运算子去构造融合图像对应的各小波系数，再通过逆变换重构融合后的图像。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。