Description: 小波变换是在傅立叶变换的基础上发展起来的，它优于傅立叶分析的地方是它在空域和时域都是局部化的，其局部化格式随频率自动变换，在高频处取窄的时（空）间窗，在低频处取宽的时（空）窗，适合处理非平稳信号，在图像处理、模式识别、机器人视觉、量子力学等领域得到广泛应用。-Wavelet transform is a Fourier transform developed on the basis, it is better than Fourier analysis of the place is that it is in the spatial and temporal localization, and its local format with the frequency of automatic conversion, and narrow at high frequencies when taken (empty) room window, taking in the low frequency when the width of the (empty) window, suitable for handling non-stationary signal, the image processing, pattern recognition, robot vision, the field of quantum mechanics has been widely used. Platform: |
Size: 5537792 |
Author:杨洋 |
Hits:
Description: 本文利用小波以及小波包在数字信号处理中表现出来的优势，将其应用到变换域通信(TDCS)中。针对基于傅里叶变换估计方法无法对非平干扰进行有效估计的缺点，于是小波技术被应用于谱估计中。作为TDCS通信前端的频谱感知阶段所应用的数学工具，进行频谱感知，小波变换可以确定干扰所在频段以及创建小波基函数，用于数据传输。并且将其与其他变换方式的应用场合以及性能进行对比。并且针第二代小波良好的数据压缩性能，拟将其应用于TDCS中，对干扰频谱进行进一步压缩-The article utilized the advantages of wavelet and wavelet packet synthesis applying in the digital signal processing domain, and applied it into the Transform Domain Communication System (TDCS). To composite the shortcomings in Fourier Transform in non-stationary noise, wavelet transform are introduced. As a mathematical tool before transformation, wavelet transform will sensing the environment, locate the interference and create a fundamental modulation waveform（FMW）。Comparison with other kinds of transforms is made in this article as well. As the same time, the second generation wavelet has a good performance in data comprising, we could consider utilizing it into further lifting in the quality of the sensing period. Platform: |
Size: 698368 |
Author:mini |
Hits:
Description: 平稳小波变换的matlab程序 还包括去噪 什么的应用-Stationary wavelet transform denoising matlab program also includes the application of what Platform: |
Size: 68608 |
Author:肖俊 |
Hits:
Description: 非平稳信号的分析和处理是由张贤达编著的非平稳信号方面的教材，主要内容包括小波变换以及短时傅立叶变换等-Non-stationary signal analysis and processing edited by Zhang Xian of the non-stationary signals of materials, mainly including wavelet transform and short-time Fourier transform Platform: |
Size: 18608128 |
Author:柳艾飞 |
Hits:
Description: 这是一个对图像做平稳Haar小波变换的程序，其中分解层数可以自由设置。-This is a Haar image to do the stationary wavelet transform procedure, in which the decomposition layers can be freely set. Platform: |
Size: 338944 |
Author:yuan |
Hits:
Description: 实现图像的二维平稳小波变换，包含对源图像的分解与重构-2-D stationary wavelet transform, including the decomposition and reconstruction of the source image Platform: |
Size: 95232 |
Author:王斌 |
Hits:
Description: 包含了图像熵的程序，三种小波变换融合方法，以及一种平稳小波变换。带有结果图-Contains a program of the image entropy three wavelet transform fusion method, and a stationary wavelet transform. With the results of Figure Platform: |
Size: 187392 |
Author:jack |
Hits:
Description: 以离散平稳小波变换的心电信号噪声去除方法为基础，根据噪声的不同来源及其频带分布特点，对变换后的细节信号采用不同的阈值去噪方案。并提出一种基于准则原理的阈值选取方法。经国际标准数据库中验证，试验表明，该方法行之有效-With discrete stationary wavelet transform of ecg signal to noise removal method as the foundation, according to the different sources of noise and its frequency distribution characteristics, to transform the details of the signal after using different threshold denoising scheme. And put forward a kind of threshold selection method based on the criterion principle. Verified by international standards in the database, the test shows that the method is effective
Platform: |
Size: 231424 |
Author:张力 |
Hits:
Description: i am doing my project in image fusion . i send the image fusion program using stationary wavelet transform. so i need image fusion program using different types of transform. Platform: |
Size: 74752 |
Author:saranya |
Hits:
Description: Image water marking using Stationary Wavelet Transform with 3-level decomposition.
The problem with DWT is lack of shift-invarience and poor spatial resolution of the resultant image.
These were reduced with SWT, at the cost of memory requirements Platform: |
Size: 1162240 |
Author:Naga Kishore |
Hits:
Description: this file include code for image fusion using different methods. The methods used in the code are discrete wavelet transform, stationary wavelet transform, fast Fourier transform, Steerable transform with weighted and adaptive weighted algorithm. Platform: |
Size: 4096 |
Author:denish |
Hits:
Description: 基于平稳小波变换的图像融合。低频分量取平均，高频分量取绝对值最大。最后做逆平稳小波变换。-stationary wavelet transfrom.Averaged low frequency components, high frequency components of the maximum absolute value. Finally, do the inverse stationary wavelet transform. Platform: |
Size: 4874240 |
Author:李欣怡 |
Hits:
Description: STFT和ST变换的基本函数，和一个stft的一个例程-This code computes the Stockwell transform (S-Transform) of a one dimensional series without for loop, thereby making it computationally fast and simple. S-Transform was proposed in 1996. A nice tutorial on S-Transform can be found here:
djj.ee.ntu.edu.tw/S_Transform.pdf?
File Information Description
The present code is a Matlab function that provides a Short-Time Fourier Transformation (STFT) of a given signal x(n). The algorithm is similar to that of Matlab command “spectrogram”. The result is:
1) stft- a matrix with complex stft coefficients with time across columns and frequency across rows
2) f- frequency vector
3) t- time vector.
swt Discrete stationary wavelet transform 1-D.
swt performs a multilevel 1-D stationary wavelet decomposition
using either a specific orthogonal wavelet ( wname see
WFILTERS for more information) or specific orthogonal wavelet
decomposition filters. Platform: |
Size: 4096 |
Author:zl |
Hits:
Description: 对图像进行小波分解,如单层二维离散小波分解,利用sym4小波函数对图像进行3层对图像进行3层平稳小波变换等，之后是对分解图像消躁，融合等的工作。-The image wavelet decomposition, such as single two-dimensional discrete wavelet decomposition using sym4 wavelet function to the image of 3 layers of image of 3 layers of stationary wavelet transform, after decomposition of the image fusion of eliminating rashness. Platform: |
Size: 8192 |
Author:王一铭 |
Hits:
Search - stationary wavelet transform