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DCTlicheng
研究表明，构成K一L变换矩阵的向量也就是ToePhtz矩阵的特征向量。与此同时，离散
余弦变换矩阵逼近于ToePutz矩阵的特征向量矩阵，所以离散余弦变换矩阵与自然图像的
K一L变换矩阵十分相似。经过离散余弦变换后的变换系数块的协方差矩阵Cy非常接近对角
阵，即除了对角线元素以外，其它很多元素都近似为0，并且在左上角集中了主要能量。这
反映了自然图像大部分区域变化不大，亮度突变只占少数，即图像能量以低频成分为主的特
性。通过变换后的量化，舍弃对视觉效果影响较小的次要信息，可达到进一步的压缩效果。
虽然从去相关性能的意义上讲，DCT是一种次于K一L变换的准最佳变换，但是从算法实现的角度来看，DCT则远远优于K一L变换。首先，当图像的分块大小确定后，DCT的变换矩阵也就随之确定了，不随输入信号的统计特性变化而变化 其次，二维DCT能够分解成两次一维DCT，有利于硬件实现。
(Studies have shown that constitute a K L transformation matrix vector is ToePhtz eigenvector of the matrix. At the same time, discrete
The cosine transform matrix approximation in ToePutz matrix eigenvector matrix, so the discrete cosine transform matrix and natural images
Is very similar to a K L transformation matrix. After discrete cosine transform, the transform coefficient block of Cy is very close to the diagonal of covariance matrix
Matrix, namely except diagonal elements, many other elements are approximate to 0, and focused the main energy in the upper left corner. this
Reflects the natural images most area changed little, brightness mutations accounted for only a few, the energy is given priority to with low frequency components of image
Sex. Through quantitative after transformation, abandoning smaller effect on the visual performance of secondary information, can achieve further compression effect.
Although from related to the performance of the sense, DCT is a kind o)
- 2013-11-25 16:00:24下载
- 积分：1
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tddeconv2
on time domain blind source separation implementation
- 2010-02-18 17:02:25下载
- 积分：1
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logistic
说明： 混沌工具 function x=logistic(n,level,a,x0)(function x=logistic(n,level,a,x0))
- 2010-04-25 23:54:22下载
- 积分：1
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Matlab
信号去噪的基本步骤：
（1）信号的小波分解；
（2）小波分解高频系数的阈值量化；
（3）信号的小波重构。使用分解的低频系数以及阈值量化后的高频系数进行小波重构。
(The basic steps of signal denoising:( 1) of the wavelet decomposition of signals ( 2) the high frequency coefficients of wavelet decomposition threshold quantization ( 3) the signal wavelet reconstruction. Using the decomposition of the low frequency coefficient and threshold quantization the high-frequency coefficient after wavelet reconstruction.)
- 2011-08-12 18:00:28下载
- 积分：1
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dianxingxiangguanfenxi
MATLAB中关于典型相关分析的数据代码，希望对大家能有多多的用处(MATLAB, canonical correlation analysis of the data on the code, and I hope to have a lot of useful)
- 2014-08-30 19:24:58下载
- 积分：1
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STAP
全自由度空时自适应处理,加载数据后可以直接运行(Full freedom of space-time adaptive processing, loading data can be run directly)
- 2013-09-02 17:13:50下载
- 积分：1
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AutomaticGainControl
Atomatic Gain Control
- 2010-06-28 23:11:06下载
- 积分：1
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paper2
Solving Power Flow Problems with a Matlab Implementation of the Power System Applications Data Dictionary
- 2010-08-18 12:38:42下载
- 积分：1
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793841379AviRead
实现正交试验,从而能够得出那几个变量最重要。(to realize experiment)
- 2010-10-25 10:50:48下载
- 积分：1
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janhie_v56
一种基于多文档得图像合并技术，关于小波的matlab复合分析，语音信号的采集与处理，数字信号处理课设。( Based on multi-document image obtained combining technique, Matlab wavelet analysis on complex, Acquisition and Processing of the speech signal, digital signal processing class-based.)
- 2016-05-11 18:29:47下载
- 积分：1
