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APcode
聚类代码(include sparse capability)(Clustering code (include sparse capability))
- 2010-09-06 11:05:42下载
- 积分:1
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fuliyebianhuan
用matlab编程对电压信号用离散化傅里叶级数变成求各次谐波含量(Matlab programming voltage signal with a discrete Fourier series becomes the harmonic content of each request)
- 2014-02-18 09:34:49下载
- 积分:1
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GUI_draw
在matlab编程环境下,实现一个跟windows自带近似的画图板程序。(In the matlab programming environment with windows built to achieve a similar drawing board procedures.)
- 2010-11-17 00:16:24下载
- 积分:1
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GM
说明: 残差灰色模型的改进算法。可以得到高精确度的预测,很实用,并附有测试文件(Improved algorithm for gray model residuals. Can be predicted with high accuracy, very practical, with a test file)
- 2011-06-04 22:20:10下载
- 积分:1
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Mcodes_for_coa
通信系统的Matlab代码,包括括通信原理书中的大多代码可直接使用。
(Matlab code of the communication system, including most of the code including communication theory book can be used directly.)
- 2012-07-26 14:21:16下载
- 积分:1
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matlab
基于matlab的图像压缩的程序,改变不同的QF得到不同的压缩图像(compact picture)
- 2010-01-17 20:16:46下载
- 积分:1
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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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p41wf4
竞争网络的matlab程序(Competing networks matlab program)
- 2007-07-26 12:11:58下载
- 积分:1
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FMThoanchinh
Discrete multitone (DMT) modulation is an attractive method for communication over a nonflat channel with possibly colored noise. The uniform discrete Fourier transform (DFT) filter bank and cosine modulated filter bank have in the past been used in this system because of low complexity.
- 2011-04-06 07:11:52下载
- 积分:1
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MATLAB_books
本书提供了使用MATLAB的实践性指导。本书是一本简明的MATLAB参考书,既适用于初学者,也适用于高级MATLAB用户。(This book provides the use of MATLAB practical guidance. This book is a concise MATLAB reference books, applies to both beginners, also suitable for senior MATLAB users.
)
- 2011-12-05 00:07:50下载
- 积分:1