MATLAB-Ch9SpareMatrix

说明：  Matlab学习宝典 解方程 Matlab学习宝典(Matlab solutions of equations Matlab Baodian learning learning Baodian)

《精通MATLAB图像处理 》 张强, 王正林编著 电子工业出版社 2009附带光盘(" Mastering MATLAB image processing," Zhang Qiang, Wang Zhenglin edited by the Publishing House of Electronics Industry 2009 comes with the CD-ROM)

对图像进行基于SIFT算法的特征提取并对图像特征并实现特征匹配(the implement of the sift algorithm and matching based on the feature extracted the image)

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)

基于Simulink的FIR数字滤波器的设计与实现(Simulink-based FIR digital filter design and implementation)

自己编写多点采集数据处理程序，用于数值仿真多点采集，很好得到一个平均曲线，非常好用，用COMSOL仿真后处理，读CSV文件格式(Write your own multi-acquisition data processing program for the numerical simulation of multi-point acquisition, good to get an average curve, very easy to use COMSOL simulation post-processing, read the CSV file format )

Tutorial for cmex in matlab builing c(cmex matlab)

对采集到的回转窑的大数据，绘制出窑体温度与气压的等高线图，通过图形可以分析，窑体工况(Large data collected kiln, draw contour map kiln temperature and pressure, can be analyzed through a graphical, kiln conditions)

小波包分析提取振动信号中的特征频率，完整的基于HMM的语音识别系统，通过反复训练模板能有较高的识别率。( Wavelet packet analysis to extract vibration signal characteristic frequency, Complete HMM-based speech recognition system, Through repeated training yQnfuphlate have higher recognition rate.)

matlab关于图像处理的命令集，是pdf格式的，对刚刚学习MATLAB的人很有帮助