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iris recognition
- 可展示虹膜图像信号提取的小波变换部分，及识别演示-iris images can be displayed signal from the wavelet transform, and identification demo
MatlababoutDCT
- 离散余弦变换(D iscrete Cosine Transform )简称D CT,是一种实数域变换,其变换核为实数的余弦函数,除了具有一般的正交变换性质外,它的变换阵的基向量能很好地描述图像信号的相关特征,所以在图像信号的变换中,D CT变换被认为是一种准最佳变换。 -discrete cosine transform (D iscrete Cosine Transform) referred D CT it is a real domain transform, transform it
flybh
- 图象的傅立叶变换与一维信号的傅立叶变换变换一样，有快速算法，本代码就是对这算法进行简单的运行实现.-image with a Fourier transform peacekeeping signal transform the Fourier transform, a fast algorithm, The code is this simple algorithm to achieve the operation.
wavelet.rar
- 二维离散小波变换的代码，用C语言实现，可用于数字信号处理、数字图像处理、地震勘探,Two-dimensional discrete wavelet transform code, using C language implementation can be used for digital signal processing, digital image processing, seismic exploration
signal-analysis
- dctcom.m文件利用DCT变换完成对输入图像进行压缩；imagecbe.m完成对输入的两幅RGB图像用小波分析的方法进行图像融合 imagecom.m完成对输入的RGB图像用小波分析的方法进行自动降噪，得到高频系数阈值，降噪效果百分比和结果 wavelet1D.m完成对输入的一维信号进行多尺度离散小波分解 wavelet2D完成对输入的二维信号进行多尺度离散小波分解；zigzag.m完成对输入的8*8矩阵按照zigzag排列抽取数据.-document the use of DCT tran
MATLAB
- Using the function to sample the voice signal and achieve fast Fourier transform in MATLAB, and then get the signal characteristics of the spectrum.Filtering the signal from the filter,and then playback the signal of voice
xiaobobianhuantux
- 小波变换是一种快速发展和比较流行的信号分析方法, 其在图像处理中有非常重要的应用, 包括图像压缩, 图像去噪, 图像融合, 图像分解, 图像增强等。小波分析是傅立叶分析思想方法的发展与延拓。除了连续小波 (CWT)、离散小波(DWT), 还有小波包avelet Packet)和多维小波。本文主要介绍小波变换的发展及其在图像处理、的应用-Wavelet transform is a fast-growing and more popular method of signal analysis,
pic393
- 频域法加入数字水印的原理是首先将原始信号（语音一维信号、图像二维信号）变换到频域，常用的变换一般有DWT、DCT、DFT、WP和分形。然后，对加入了水印信息的信号进行频域反变换（IDWT、IDCT、DFT、WP），得到含有水印信息的信号。-Frequency-domain digital watermarking method by adding the principle is that first of all, the original signal (voice signal of on
dtcwpt
- 2-band discrete wavelet transform (DWT) Dual-Tree Complex Wavelet Packet-The 2-band discrete wavelet transform (DWT) provides an octave-band analysis in the frequency domain, but this might not be ‘optimal’ for a given signal. The discrete wave
walsh2D
- 用于数字信号处理和图像处理的二维walsh变换-For digital signal processing and image processing of two-dimensional transform walsh-walsh
DCT_JPEG
- 给予matlab的JPEG压缩程序，包含原始压缩图片，程序对灰度bmp图片进行JEPG编码，压缩成以0101形式的编码。JPEG编码先把图象色彩RBG变成亮度Y和色度Cr、Cb，它利用人的视觉对色度不敏感的特点，减少一部分色度数据，以达到压缩。 JPEG采取多种编码方式，包含有行程编码(Run Length Coding)和哈夫曼(Huffman)编码，有很高的压缩比。在编码前，先对数据进行分块，离散余弦变换（DCT）及量化，保留能量大的低频信号，丢弃高频信号以达到压缩。-Given to th
wavelet
- Images require substantial storage and transmission resources, thus image compression is advantageous to reduce these requirements. The report covers some background of wavelet analysis, data compression and how wavelets have been and can be used for
signal
- 无调制的从一群人声音中提取一个人的声音，使用傅里叶变换和滤波-No modulation of the sound from a group of people to extract a person' s voice, the use of Fourier transform and filtering
suijixinhao
- 随机信号的几种分析代码，如求均值，FFT变换，加白噪声， 平滑滤波-Several random signal analysis code, such as averaging, FFT transform, plus white noise, ' smoothing filter
Matlab-digital-signal-processing
- matlab在数字信号处理教学中的应用，包括各种变换，数字滤波-MATLAB in the teaching of digital signal processing applications, including transform, digital filtering
Sine-signal-superposition
- 分别画两个频率不同的正弦信号及他们叠加的信号,y1、y2及他们的叠加信号进行采样,进行傅里叶变换,幅频图,频谱图-Videos two sinusoidal signals of different frequencies, and their superimposed signal, Y1, Y2 and their superimposed signal to be sampled, the Fourier transform, amplitude and frequency diagram
cs
- 通过信号的系数变换，线性测量和重构，实现压缩感知，已对图像进行后续处理-Signal transform coefficients, linear measurement and Reconstruction, compressed sensing, and image post-processing
wavelet-transform
- 对含噪声信号进行小波变换；对变换得到的小波系数进行某种处理，以去除其中包含的噪声；对处理后的小波系数进行小波逆变换，得到去噪后的信号-Containing noise signal wavelet transform the wavelet transform coefficients to a treatment to remove the noise contained therein the treated wavelet inverse wavelet transform coeff
The-Fourier-transform
- 将时域信号分解为不同频率的正弦信号或余弦函数叠加之和。连续情况下要求原始信号在一个周期内满足绝对可积条件。-The time-domain signal into different frequency sine or cosine function signal superimposed sum. Required to meet the continuous case the original signal is absolutely integrable conditions in a s
Wavelet-Transform-and-Neural-Network
- 为保障安全与电力用户供电质量，基于并网逆变器的分布式发电(distributed generation DG)系统要求具备孤岛检测功能。针对被动式孤岛检测法检测盲区(non-detectionzone，NDZ)大、检测时间长以及主动式孤岛检测法影响分布式发电系统供电质量的缺点，提出了一种新的被动式孤岛检测方法。该方法利用小波变换从公共耦合点(point ofcommon coupling，PCC)处的电压信号及逆变器输出电流信号中提取特征量，再通过BP 神经网络进行模式识别来判断是否出现孤岛现象