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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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npp2
这是一个有关中国邮递员的问题的算法，可以用于许多实际的问题(This is an issue of the Chinese postman algorithm can be used for many practical problems)
- 2011-09-01 16:24:07下载
- 积分：1
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hurst
市场择时研究之hurst指数的matlab实现(Research on the realization of the Hurst index of MATLAB market timing)
- 2014-09-26 13:40:33下载
- 积分：1
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Matlabapplication
matlab在27种问题中的应用包括
等切面曲线和相似曲线
旋转网球的轨迹
道路照明问题
计算平面日晷等
(matlab 27 kinds of problems in the application of such section, including rotation curve and the curve similar to tennis, track lighting and other problems of plane sundial)
- 2010-08-18 07:48:14下载
- 积分：1
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pointinteret
la detection des points interets
- 2012-05-08 18:02:52下载
- 积分：1
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PID-and-RBF-Neural-Network
与大家分分享一篇发表的小论文啊，水平有限，希望大家一起学习，共同进步。(Share article published papers and divide it, ah, the limited level of hope with learning and common progress.)
- 2013-03-11 21:53:07下载
- 积分：1
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Interpolation
计算方法，曲线插值，普通插值法。自编程序。附带图片。(Calculation methods, curve interpolation, ordinary interpolation. Self programming. With pictures.)
- 2013-12-08 17:38:43下载
- 积分：1
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VisualCMATLABImageProcessingAndRecognitionOfPracti
《visual c++matlab图像处理与识别实用案例精选》源码与Visual C++_MATLAB图像处理与识别实用案例精选(" Visual c++ matlab image processing and recognition of practical cases selected" source code and Visual C++ _MATLAB image processing and recognition of practical cases selected)
- 2010-07-14 10:35:08下载
- 积分：1
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Data-processing
基于FFT的功率谱分析程序设计与应用
2）对实验所采集的转子振动信号进行频谱分析
2．讨论：
1) 信号经过均值化处理或不经过均值化处理的结果比较
2）采用不同窗函数时的谱结果（矩形窗函数, 汉宁窗函数，汉明窗）
3）典型函数的频谱（矩形窗函数, 汉宁窗函数，直线，阶跃函数，δ函数，方波，三角波等）
4）整周期和非整周期采样时两者的比较
5）讨论实验结果
(Based on the FFT power spectrum analysis of program design and Application2) on experimental collection of the rotor vibration signal spectrum analysis2 discussion:1) the signal through the mean treatment or not after a mean treatment results comparison2) using different window function spectral results ( rectangle window, Hanning window function, the Hamming window )3) the typical functions of spectrum ( rectangle window, Hanning window function, linear, step function, function, square wave, triangular wave)4) the whole cycle and non-integer-period sampling time comparison5) discussion of experimental results)
- 2012-01-05 15:45:44下载
- 积分：1
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hammingcode(tansfervoice)
详细的汉明码讲解及编程，本程序只适用传送语音信号等N*1维的矩阵数据，要是想传送灰度或者彩色图片，需要修改一下。(Hamming code in detail to explain and programming, this procedure applies only to transmission of voice signals, such as N* 1-dimensional matrix of data, if would like to send grayscale or color images, the need to make some corrections.)
- 2007-11-27 08:41:13下载
- 积分：1
