[波变换] 小波变换与集合经验模态分解
针对不同采样频率和输入信噪比的心磁信号进行滤波操作，呈现出对同一输入信号采取不同滤波算法的去噪结果。
The filtering operation is performed on the magnetic heart signals of different sampling frequencies and input signal-to-noise ratios, showing the denoising results of different filtering algorithms for the same input signal. (2021-03-17, matlab, 66KB, 下载3次)
[波变换] wavefilter
对噪声图片进行小波变换，采用合适的阈值进行滤波，再对处理后的图像进行锐化处理，得其信噪比
Image noise wavelet transform, using a suitable threshold value filtering processing is then performed on the image sharpening process, obtaining the signal to noise ratio (2017-04-11, matlab, 1KB, 下载3次)
[波变换] dimensionalspectral
小波变换是一种线性运算 , 它对信号进行不同尺度的分解 , 可有效地应用于如
信噪分离 , 提高时频两域的分辩率等 。本文讨论小波变换用于心电 Q RS 波形中细微特征
( 即高频成份特征 ) 提取的方法.
Wavelet transform is a linear operation, its signal is decomposed at different scales, can be effectively used as the signal to noise separation, the two time-frequency domain, such as to improve the resolution. This article discusses the wavelet transform of ECG waveform Q RS subtle features (ie, features high-frequency components) extraction method. (2015-02-28, VHDL, 145KB, 下载4次)
[波变换] Wavelet-dec--rec
在理解了离散小波变换的基本原理和算法的基础上，通过设计VC程序对简单的一维信 号在加上了高斯白噪声之后进行Daubechies小波、Morlet小波和Haar小波变换，从而得到小波分解系数；再通过改变分解得到的各层高频系数进行信号的小波重构达到消噪的目的。在这一程序实现的过程中能直观地理解信号小波分解重构的过程和在信号消噪中的重要作用，以及在对各层高频系数进行权重处理时系数的选取对信号消噪效果的影响。
In understanding the basis of discrete wavelet transform basic principles and algorithms, through the design VC program Daubechies wavelet, Morlet wavelet and Haar wavelet transform after a simple one-dimensional signal plus a Gaussian white noise, resulting wavelet coefficients wavelet reconstruction signal again by changing the layers to achieve high-frequency coefficients decomposed noise cancellation purposes. Can intuitively understand wavelet decomposition and reconstruction process and an important role in signal de-noising in the process of implementation of this program, and in the high-frequency coefficients when the weight of the layers selected for signal processing coefficients denoising affected. (2014-07-10, Visual C++, 156KB, 下载12次)
[波变换] digital-image-coding-
针对日益进步的图像变换编码技术，对目前已经纳入ＭＰＥＧ４和ＪＰＥＧ２０００编码标准的采
用离散小波变换进行数字图像编码的原理与硬件实现进行了综述介绍．在分析小波变换快速算
法的基础上，重点讨论了近１０年来所提出的各种离散小波变换硬件实现的典型结构，在硬件资
源与处理速度两个方面进行了比较．对于变换后的系数量化，总结了几种基于嵌入式零树小波编
码的算法，比较其峰值信噪比和编码时间．相较于离散余弦变换进行图像编码，采用离散小波变
换在压缩效率、还原图像质量上具有更大的优越性
For the increasingly progressive image transform coding techniques have been incorporated into the current MPEG 4 and JPEG2000 coding standard discrete wavelet transform digital image coding principle and hardware implementation are reviewed introduction. In analyzing wavelet transform algorithm based on fast, focused on the past 10 years, the proposed hardware implementation of a variety of discrete wavelet transform the typical structure of the hardware resources and the processing speed of two aspects of the comparison. For the transformed coefficient quantization, summarizes several based EZW coding algorithm to compare the peak signal to noise ratio and encoding time. Compared to the discrete cosine transform image coding, using discrete wavelet transform in compression efficiency, reducing image quality advantages of a greater (2013-10-19, PDF, 337KB, 下载4次)
[波变换] wavelet_denosie
小波变换去噪：1.小波分解2.阈值处理3.小波重构。 通过以上三步实现信号去噪，程序中可设定分解级数与信噪比等参数。
Wavelet denoising: 1. Wavelet decomposition 2 threshold processing 3. Wavelet reconstruction. Through the above three steps to achieve signal de-noising, the program can be set decomposition level and signal to noise ratio and other parameters. (2013-05-27, matlab, 1KB, 下载33次)
[波变换] youyongde
频谱分析，对信号进行强制性去噪处理并图示结果，用默认阈值对信号进行去噪处理并图示结果，信噪比
Spectrum analysis, mandatory denoising signal and illustrates the results of the signal with the default threshold denoising icon results signal-to-noise ratio (2013-04-14, matlab, 4KB, 下载5次)
[波变换] tuxiang_erweibianhua
对图像进行二维离散小波变换, 变换级数大于等于3级, 并进行重构, 最后计算重构图像的峰值信噪比(PSNR) matlab
Image two-dimensional discrete wavelet transform, transform levels greater than or equal to 3, and reconstruction, the final calculation of the reconstructed image of the peak signal to noise ratio ( PSNR ) matlab (2012-11-27, matlab, 3KB, 下载10次)
[波变换] OFDM_0901
在低信噪比情况下，实现正交频分复用波形的匹配滤波
In the case of low signal-to-noise ratio, to achieve orthogonal frequency division multiplexing waveform matched filtering. (2012-08-24, matlab, 1KB, 下载20次)
[波变换] sonar2
基于平移不变小波变换的多普勒速度声纳输出信号处理.针对水下航行器组合导航系统所使用的多普勒速度声纳输出信号的特点,采用了平移不变小波变换的多分辨率分析的方法,利用Daubechies小波函数,采用了半软阈值去噪的方法,能够在低信噪比的情况下准确地估计多普勒声纳的频移,从含有噪声的多普勒输出信号中提取出原始信号.通过仿真实验表明:采用4层小波分解,算法计算量减小,有效地消除多普勒噪声,从而提高水下组合导航系统的精度.
Doppler speed the sonar output signal processing based on translation invariant wavelet transform. Integrated navigation system for underwater vehicle using the Doppler-velocity sonar output signal using translation invariant wavelet transform multiresolution analysis method using Daubechies wavelet function, using a semi-soft threshold denoising method to accurately estimate the Doppler sonar frequency shift in the case of low signal-to-noise ratio output signal with noise from the Doppler extract the original signal. Simulation results show that: 4 layer wavelet decomposition algorithm to calculate the amount decreases, effectively eliminate the Doppler noise, thereby improving the accuracy of the underwater integrated navigation system. (2012-08-21, Visual C++, 318KB, 下载28次)
[波变换] RECGGdenoisiie
去除在心电信号采集过程中混入的肌电干扰、工频干扰、基线漂移等噪声信信号，避免噪声对心电信号特征点的识别与提取造成误判漏判 已通过测试。
Remove the EMG interference mixed with the signal acquisition process in mind, frequency interference, baseline drift and noise channel signal to avoid noise caused by the misjudgment of the Missing has been tested on ECG feature identification and extraction. (2012-08-13, Visual C++, 262KB, 下载69次)
[波变换] thresholdHSI
采用小波变换的方法实现心电信号的滤波，分别使用了硬阈值、软阈值和改进阈值方法，并实现了滤波效果的评价（均方差和信噪比）
Wavelet transform of ECG signal filtering method, respectively, using a hard threshold and soft threshold and improve the threshold method, and to achieve the filtering effect of the evaluation (both variance and signal to noise ratio) (2011-07-23, matlab, 3KB, 下载167次)
[波变换] xbryz
此代码，可以完成matlab下的小波软阈值图像去噪，可以做不同阈值下的图像去噪，并通过峰值信噪比psnr的比对来说明阈值选取的方法
Wavelet threshold denoising compared soft threshold and hard threshold and the current method of calculating the various thresholds and thresholds approach the performance of function, through the signal to noise ratio and mean square deviation of the comparison, the various algorithms advantages and disadvantages. (2011-05-16, matlab, 66KB, 下载44次)
[波变换] normadata
基于小波分析的一维信号消噪原理如下:由于
在实际的工程应用中，有用信号通常表现为低频信
号或是一些比较平稳的信号，而噪声信号则通常表
现为高频信号。所以在进行消噪过程中可以按照如
下的方法进行处理:首先对需要处理的信号(有用信号加噪声)进行小波分解.
wanepack (2010-08-31, matlab, 7784KB, 下载16次)
[波变换] compression
主要用于图像经小波变换压缩图像，并计算压缩后的图像压缩性能即压缩比和信噪比
Mainly used for image compression by wavelet transform image, and calculate the compressed image compression performance that the compression ratio and signal to noise ratio (2010-01-29, matlab, 2KB, 下载250次)
[波变换] sevenchapter
《Visual C++小波变换技术与工程实践》 作者：靳济芳。书上的代码。第6章：网络图像渐进传输实用案例。包括：图像多分辨率表示，基于感兴趣区域的编码，传输信噪比控制，图像的渐进传输等的Visual C++编程实现，供大家参考。
" Visual C++ wavelet transform technology and engineering practice," Author: Ji Jin-fang. On the code book. Chapter 6: Network Image Utility progressive transmission case. Include: multi-resolution images that the region of interest based on the encoding, transmission noise control, such as progressive transmission image of the Visual C++ Programming for reference. (2009-04-07, Visual C++, 664KB, 下载17次)
[波变换] JPEG2000_9_7_002.pdf
基于实数的二进制表示法，把CDF(Cohen，Daubechies and Feauveau)9／7双正交小波基的提升系数化为二进制，采用简单的移位一加操作代替结构复杂的浮点乘法器，从而实现了JPEG2000中9／7离散小波变换的定点计算．相对于浮点计算法，移位一加操作最大的优点是计算简单，特别易于超大规模集成电路实现，因而使硬件实时处理图像信号成为可能．实验仿真结果表明：在低压缩比的情况下，用移位一加操作重构的图像，其峰值信噪比(PSNR)只比浮点法低0．10 dB，当压缩比增大时，其PSNR值略好于浮点法．
关键词： 离散小波变换；定点计算；浮点计算法；提升；移位一加操作
Based on the real number of binary notation, the CDF (Cohen, Daubechies and Feauveau) 9/7 Biorthogonal wavelet enhancement factor into the binary, using a simple shift operation in place of one plus the complex structure of floating-point multiplier, in order to achieve the JPEG2000 9/7 discrete wavelet transform the fixed-point calculation. Compared with the floating-point calculations, shift operation of one plus the biggest advantages is the calculation is simple, especially vulnerable to the realization of ultra-large-scale integrated circuits, making real-time image processing hardware signal possible (2009-01-19, C/C++, 221KB, 下载25次)
[波变换] DSP_JPEG2000_001.pdf
本文介绍了JPEG2000的静态图像压缩技术在TI TMS320DM642 DSP上的实现过程；对压缩技术核心小波算法结构进行改进，对硬件特点的程序结构、具体代码及总线读写等方面的改进作了详细描述．改进后的软件系统，对于1 024×768像素大小的图像、数据存储空间仅需6 KB，使得在资源有限的DSP芯片上能够运行JPEG2000图像压缩技术；编码速度相对于未改进的提高了l2～ 2O倍，可迭到3帧／s；压缩比为O．5 bit／p时，峰值信噪比可达到3O．
This paper introduces the JPEG2000 still image compression technology in the TI TMS320DM642 DSP Implementation process on wavelet compression technology is the core algorithm to improve the structure of the hardware features of the process structure, read and write the specific code and bus improvements, such as was described in detail . The improved software system, for 1 024 × 768 pixel image size, data storage space only 6 KB, allows limited resources to run the DSP chip JPEG2000 image compression technology encoding speed is not improved relative to the improvement of the l2 ~ 2O-fold, again and again to be 3/s compression ratio for O. 5 bit/p, the peak signal to noise ratio can be achieved 3O. (2009-01-19, C/C++, 238KB, 下载35次)
[波变换] MyDwt2D
对图像进行二维离散小波变换, 变换级数大于等于3级,然后统计系数中0的个数（百分比表示），并进行重构, 最后计算重构图像的峰值信噪比(PSNR).
里面还附上了我写的实验报告，对大家理解Mallat算法和图像压缩很有帮助
Image two-dimensional discrete wavelet transform, transform series greater than or equal to 3, and then statistics of the number of coefficients in 0 (expressed as a percentage), and reconstruction, the final calculation of reconstructed image of the peak signal to noise ratio (PSNR). which also includes the experimental report I wrote to all of us understand the Mallat algorithm and image compression helpful (2008-11-21, C/C++, 963KB, 下载126次)
[波变换] haarWaveletCoding
完成对输入图像Fig8.23.jpg利用Haar小波进行图像小波变换，变换系数量化，小波逆变换完成图像重构，并计算其重构图像的均方误差和信噪比来评估图像的重构误差
Completion of the input image Fig8.23.jpg use Haar wavelet image wavelet transform, transform coefficients quantify the inverse wavelet transform the completion of image reconstruction, and calculate the reconstructed image of the mean square error and signal to noise ratio to assess the image reconstruction error (2007-12-25, matlab, 128KB, 下载176次)