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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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The-least-squares-fitting-data
本程序为最小二乘法拟合程序，采用该程序方便进行数据处理。(failed to translate)
- 2013-05-08 23:49:23下载
- 积分：1
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GUI_of_matlab
GUI制作中文资料，以中文的形式介绍如何在matlab中实现创建GUI 界面(Chinese GUI production information to the Chinese in the form of matlab on how to create a GUI interface to achieve)
- 2009-04-12 10:23:44下载
- 积分：1
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BPexample
开发环境:Matlab
简要说明:动量-自适应学习调整算法。在实际应用中，原始的BP算法很难胜任，因此出现了很多的改进算法。BP算法的改进主要有两种途径，一种是采用启发式学习方法，另一种则是采用更有效的优化算法。本例采用动量BP算法，来实现对网络的训练过程，动量法降低了网络对于误差曲面局部细节的敏感性，有效地抑制网络陷于局部极小。(development environment : Matlab Brief Description : Momentum-adaptive learning algorithm adjustments. In practical application, the original BP algorithm competence, resulting in a lot of improved algorithm. BP algorithm improvements There are two main ways of using a heuristic approach to learning Another is the use of a more effective method of optimization. Momentum cases using the BP algorithm to achieve the network training process, Momentum for reducing error of the network for local surface details of the sensitivity, to effectively curb the network into local minima.)
- 2006-09-11 10:13:29下载
- 积分：1
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networks-lab-manual-ECP62
Networking stimulator manual using matlab coding
- 2014-10-10 01:38:05下载
- 积分：1
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混沌理论计算 互信息计算最佳延迟时间
混沌理论计算 互信息计算最佳延迟时间，保证可以运行(Mutual information to calculate the optimal delay time to ensure that you can run)
- 2014-04-11 12:20:29下载
- 积分：1
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31_15_RS
实现RS（31-15）编码，在JTIDS物理层通信系统中使用。(Achieve RS (31-15) encoding, using the physical layer in a communication system JTIDS.)
- 2021-03-31 08:59:09下载
- 积分：1
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DigitalCommunicationoverFadingChannels_Simon
this book is udefull in working with fading channels
- 2009-05-25 13:40:16下载
- 积分：1
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OFDM_signals
Orthogonal Frequency Division Multiplexing(OFDM) signal simulation(Orthogonal Frequency Division Multiplex ing (OFDM) signal simulation)
- 2007-04-12 21:48:07下载
- 积分：1
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Untitled1
认知无线电的能量检测算法，是很珍贵的材料，老板推荐的哦(Energy detection algorithm for cognitive radio)
- 2012-06-07 11:37:25下载
- 积分：1
