farthest_insertion_2opt

说明：  Lowe2004年发表于IJCV的关于SIFT算法的经典论文(Lowe2004 published in IJCV' s classic paper on the SIFT algorithm)

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)

this file contains simulink model of 14 IEEE bus sytem for power transmission

用实例演示如何在matlab中调用c++，适用于初学者，很好的例子(With examples demonstrate how to call c++ in matlab for beginners, a good example)

Matlab绘制3-D图形的几个例子，很详细，也很全面的介绍了绘制3-D图形的函数，其中最后一个是画直方图的，横向和纵向都有例子。(Matlab 3-D graphics to draw a few examples of very detailed and very comprehensive introduction to drawing 3-D graphics functions, the last one is the histogram drawing, horizontal and vertical are examples.)

用基于 Matlab 的小容量 FFT (比如 256×256)程序，将取样窗口划分为 若干个全等的小矩形,对每个小矩形内离散点的复振幅作 FFT 变换,然后将所有变 换结果叠加，再乘以复数相位因子,相当于对整个物面上点进行菲涅耳衍射计算， 利用这种方法可以迅速的实现高精度的轴对称傍轴光学系统中的激光衍射计算 (With a small volume based on Matlab FFT (eg 256 × 256) procedure to sample window divided into a number of small identical rectangles, each small rectangle of discrete points within the complex amplitude for the FFT transform, and then transform the results of all the superposition multiplied by the complex phase factor, the equivalent point on the object plane Fresnel diffraction calculation, the use of this method can rapidly achieve high-precision optical system axis of symmetry in the paraxial calculation of laser diffraction)

一个很好的fast marching算法的工具箱，是用matlab语言编写的(a good fast marching algorithm toolbox is the use of the Matlab language)

一个利用matlabGUI设计的学生成绩查询的小系统，还需要进一步完善。( Type text or a website address or translate a document. Cancel Yīgè lìyòng matlabGUI shèjì de xuéshēng chéngjī cháxún de xiǎo xìtǒng, hái xūyào jìnyībù wánshàn. Example usage of "": automatically translated by GoogleChinese (Simplified)EnglishSpanish AlphaA using matlabGUI design student achievement query system, still need further improvement.)

基于matlab软件实现等距离离散化为粗糙集约简前准备(matlab Equidistance discretization)

该程序用于matlab读取ENVI标准格式文件，直接运行READFILE，选择需要打开的图像文件即可(The program for the matlab read ENVI standard format files directly run READFILE, select the desired image file can be opened)