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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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2113
MATLAB信号处理详解、基于Simulink的OFDM通信系统仿真、基于MATLAB的系统分析与设计。(Detailed signal processing MATLAB, Simulink-based OFDM communication system simulation, MATLAB-based system analysis and design.)
- 2011-11-08 17:03:20下载
- 积分：1
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matlabiirlvbo
iir滤波器对有噪语音滤波,在matalb上实现(IIR filter noisy speech filtering, on matalb)
- 2013-04-30 08:56:15下载
- 积分：1
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gmm
fast EM GM algorithm solving long computation time in matlab
- 2009-04-12 17:48:49下载
- 积分：1
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RSana
说明： 用于计算HURST指数的分形维数的MATLAB小程序，属于经典的。(HURST index used to calculate the fractal dimension of the MATLAB small procedures, are classic.)
- 2008-10-24 23:48:37下载
- 积分：1
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DangleTraackB
DBF结合单脉冲一维角度跟踪 DBF结合单脉冲一维角度度跟踪DBF结合单脉冲一维角度跟踪，已通过测试。
(DBF combined with single-pulse one-dimensional point of view to track a the DBF combination of single-pulse one-dimensional point of view the degree of tracking DBF combined with single-pulse one-dimensional point of view tracking, has been tested.)
- 2012-06-09 09:35:21下载
- 积分：1
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MATLAB-analysis-of-30-cases
MATLAB智能算法30个案例分析 源代码(MATLAB intelligent algorithm analysis of 30 cases the source code)
- 2013-03-06 10:59:37下载
- 积分：1
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SEGY
this code convert mat data to segy format. segy format is known to seismic softwares
- 2012-01-09 17:28:36下载
- 积分：1
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AM
说明： AM信号的生成多种方式去噪,小波变换，自适应滤波器，SVD去噪(AM signal to generate a variety of ways denoising, wavelet transform, adaptive filters, SVD denoising)
- 2014-03-20 11:06:18下载
- 积分：1
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ARIMAtest
对于时间序列模型建立ARMA预测模型，可对未来值进行预报。(For the time series model, the ARMA prediction model is established, and the future value can be forecasted.)
- 2017-07-12 16:48:59下载
- 积分：1
