本文从理论上分析了小波滤波器特性,提出了一种适合弱小目标图像的快速滤波方法。
This dissertation makes a theoretical study of filter feature, then applies it into small image denoising, and present a fast denoising method suitable for small target images.
作为不可分小波理论的一个重要方面,不可分小波滤波器的设计已经成为人们研究的热点。
As an important part of the theory for non-separable wavelets, the design of non-separable wavelets filter Banks has already became the hotspot of research on wavelet theory.
并进一步构造了与尺度函数对称点一致、系数长度不超过8的所有对称(反对称) 小波滤波器组。
Moreover, all symmetric and antisymmetric wavelets, which have same symmetric point as the scaling function and the length of their filters are no more than 8, are also given.
在算法中,小波滤波器直接修正重建滤波器,重建得到各种细节图像,并能快速地得到重建图像的轮廓。
The filters of reconstruction are revised directly by wavelet filters in this algorithm and the reconstruction gives us various detail images and coarse images very quickly.
论文基于这一思想,从二维平滑函数出发,并根据尺度呈级数变化的特点,导出了一组多尺度小波滤波器。
According to the peculiarity that the scale exhibit progressional variety, this paper deduces a group of multiscale wavelet filter from two dimensions smooth function.
本文从小波变换的基本概念出发,提出了波形匹配的具体实现方法,利用优化函数来得到最优小波滤波器。
Based on the basic conceptions of wavelet transform, the realization of waveform matching and find the optimized wavelet filter is presented in this paper.
对一般的双正交多小波系统,给出了阶平衡的较为简单的定义,并将预滤波理论引入双正交多小波滤波器组。
For common biorthogonal multi-wavelets system, a simple definition of balancing of order is proposed, and the prefilter theory is introduced to biorthogonal multi-filter Banks.
针对伯恩斯坦多项式中参数的不确定性,提出了一种基于遗传算法的具有EBFB特征的小波滤波器优化设计方法。
Due to the uncertainty of parameters of the Bernstein polynomial, a design method for optimizing wavelet filter while maintaining the property of EBFB based on genetic algorithms is presented.
文中还介绍了有源电力滤波器的原理,构思了基于小波分析方法检测谐波的小波滤波器,初步设计了小波滤波器的检测电路。
This paper also introduces the principium of APF, puts forward the framework of the wavelet APF and designs the detect circuit of the wavelet APF primarily.
本文利用基于四进制小波滤波器的MRAGM算法,成功地把全色影像和多光谱影像进行了融合,结果显示该方法的效果令人满意。
The paper introduces the IKONOS image fusion by MRAGM algorithm with 4 band wavelets filter. The result shows this method is suitable to fuse IKONOS panchromatic image and multi spectral image.
提出了一种用于多尺度边缘检测的小波变换滤波器系数的计算方法,并且以具体例子进行了检验,表明了该方法的有效性。
A method of calculating wavelet transformation filter coefficients for multiscale edge detection is given in this paper, and the efficiency of the method is clarified.
利用MATLAB软件包中的信号处理部分,用小波和滤波器方法为实验数据去噪声,并比较各种方法的特点和适用范围。
Signal procession is analysised by Wavelet Toolbox and filters based Signal process Toolbox of MATLAB. Specialties and using areas of the two ways are studied.
本文研究尺度滤波器的基本分解问题。基于所得结果,对于任意给定的尺度滤波器,给出了双正交小波矩阵的构造方案。
In this paper, the factorization of scaling vector filters into prime factors is considered. A construction of bi-orthogonal wavelet matrix with pre-asigned scaling filter is given.
为克服当前的包络分析法需要选择合适的滤波器参数的局限性,提出了一种基于小波变换的包络分析方法。
An envelope analysis approach based on wavelet transform is proposed in this paper to overcome the limitation of current envelope analysis approach in which the fit filter parameter must be chosen.
本文研究基于对数域状态空间滤波器的一维连续小波变换VLSI实现理论与方法。
The theories and the methods of VLSI implementation of one-dimension continuous wavelet transform(CWT) . which bases on state-space log-domain filter, are developed in the paper.
结果表明,将小波域上的经验维纳滤波器与平移不变小波相结合进行去噪,所得到的效果是最佳的。
From the experiments and analysis carried out in the paper, the optimal denoising results can be obtained by the combination of the empirical Wiener filter and the translation invariant wavelet.
此外,本文还对陀螺信号进行了小波变换滤波和IIR数字滤波器滤波并对上述三种方法的滤波性能进行了对比分析。
The wavelet transform filter and infinite impulse response (IIR) digital filter is applied, and the output signals of the three filters are compared.
这门小波、滤波器库和应用的交叉课程包含有完整的一套课堂讲稿、作业、工具和相关资源。
This cross-disciplinary course on Wavelets, Filter Banks and Applications features a complete set of lecture notes, problem sets, tools, and related resources.
为克服以往滤波器组参数调整复杂问题和实现电子耳蜗语音处理的快速数字化计算,提出了将小波变换应用于电子耳蜗的语音处理。
A new method on the basis of wavelet transform (WT) was presented to easily adjust the parameters of filter bank and realize fast algorithm of speech processing for cochlear implants.
以其他波段的几何信息辅助噪声污染波段重构,经过相应的小波重构滤波器滤波,获得该波段图像的重建以进行消噪。
Assisted by other bands high frequency geometric information, reconstruct noise band image with wavelet reconstruction filter to de-noise noise band image.
从完全重构滤波器组出发,分析了小波与滤波器组之间的关系,讨论了复数离散正交小波的构造。
Starting from perfect reconstruction filter Banks, the relationship between the wavelet and the filter Banks is analyzed, and the construction of complex discrete orthonormal wavelet is discussed.
针对地震反演预处理的地震降噪问题,本文结合小波分析设计了一种过零点滤波器,对多分量地震资料进行了面波剔除研究。
In the denoising and preprocessing for seismic inversion, a zero-crossing filter is developed based on wavelet analysis to remove surface waves from the multi-component seismic data.
为此将中值滤波与小波阈值去噪相结合构造了小波域中值滤波器,并应用于陀螺数据处理中。
Therefore based on the median filter and the threshold de-noising of wavelet, the wavelet domain median filter was formed, and it was applied to the gyro's signal processing.
基于双线性变换采用开关电流积分器综合实现低通滤波器,解决了时域法小波变换实用电路集成化的关键问题。
Si low pass filter is synthesized with si integrators based on bilinear transform. Thus, it provides a solution to manufacture integrated chip of time-domain CWT.
小波阈值降噪技术利用小波变换表示信号的稀疏性质,使用对角形式的阈值滤波器达到信号降噪的目的,这个方法在很多信号空间上是近似最优的。
Wavelet thresholding technology is using the sparse property of wavelet representation and diagonal filter for signal denoising . This method is nearly optimal in many signal spaces.
针对地震信号随机干扰的特点,运用二维小波变换的理论,设计了相应的变换域去噪滤波器。
A filter is designed to attenuating noise in accordance with the characteristics of seismic signals having a random disturbance with the theory of the 2-d wavelet transform.
该结构采用了递归金字塔算法(RPA)取代传统的PA算法。只用一组滤波器即可完成所有级别的小波运算。
The proposed architecture adopt recursive pyramid algorithm(RPA)instead of the classical pyramid algorithm(PA), only one low-pass filter and high-pass filter are required to compute all levels.
利用小波变换的正交线性性质,设计基于小波算法自适应滤波器。
By applying orthogonal linearity of wavelet transformation, a self adapting filter is designed on the basis of wavelet algorithm and is effectively applied to power active filter.
分析了激光成像雷达系统中所成的散斑像的乘法模型 ,并在此基础上利用一基于小波的同态滤波器对被散斑污染的图像进行了消噪处理。
In this paper, multiplication model of speckle image in imaging lidar is analyzed, and then suppression processing for the speckle image is finished by homomorphic wavelet filter.
分析了激光成像雷达系统中所成的散斑像的乘法模型 ,并在此基础上利用一基于小波的同态滤波器对被散斑污染的图像进行了消噪处理。
In this paper, multiplication model of speckle image in imaging lidar is analyzed, and then suppression processing for the speckle image is finished by homomorphic wavelet filter.
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