lvq_apple

产生右图所示图像f1(m,n)，其中图像大小为256×256，中间亮条为128 ×32，暗处=0，亮处=100。对其进行FFT： ① 同屏显示原图f1(m,n)和FFT(f1)的幅度谱图； ② 若令f2(m,n)=（-1）m+n f1(m,n)，重复以上过程，比较二者幅度 谱的异同，简述理由； ③ 若将f2(m,n)顺时针旋转90 度得到f3(m,n)，试显示FFT(f3)的幅 度谱，并与FFT(f2)的幅度谱进行比较； ④ 若将f1(m,n) 顺时针旋转90 度得到f4(m,n)，令f5(m,n)=f1(m,n)+f4(m,n)，试显 示FFT(f5)的幅度谱，并指出其与FFT(f1)和FFT(f4)的关系； ⑤ 若令f6(m,n)=f2(m,n)+f3(m,n)，试显示FFT(f6)的幅度谱，并指出其与FFT(f2)和 FFT(f3)的关系，比较FFT(f6)和FFT(f5)的幅度谱。(Generating an image f1 (m, n) shown in the figure, wherein the image size is 256 256, the intermediate light bar 128 32 0 = dark, bright Department 100. Its FFT: ① screen display picture f1 (m, n) and the FFT (f1) of the amplitude spectrum ② If so f2 (m, n) = (-1) m+n f1 (m, n), repeat The above process, comparing the amplitude spectrum of the similarities and differences between the two, brief reasons ③ If f2 (m, n) 90 degrees clockwise to get f3 (m, n), try to display FFT (f3) the amplitude spectrum and with the FFT (f2) comparing the amplitude spectrum ④ If f1 (m, n) obtained by 90 degrees clockwise f4 (m, n), so f5 (m, n) = f1 (m, n)+f4 (m, n ), try to display FFT (f5) amplitude spectrum, and pointed out its relationship with the FFT (f1) and FFT (f4) of ⑤ If so f6 (m, n) = f2 (m, n)+f3 (m, n) and try to display the FFT (f6) amplitude spectrum, and pointed out its relationship with the FFT (f2) and FFT (f3), comparing FFT (f6) and FFT (f5) amplitude spectrum.)

利用matlab编写的区域生长的程序，用于图像分割(Prepared using matlab region growing process for image segmentation)

This file is used for generate OVSF code in Matlab. Check this and enjoy using it

说明：  一篇关于SIMULINK实时设计的文章，很不错的资料，互相学习一下吧。(SIMULINK real-time design of an article on the article, very good information, learn from each other about it.)

matlab 实现的基于logistic 混沌映射的图像加密，可用于灰度图像和彩色图像的加密。(Grayscal and color image encryption based on Logistic map)

说明：  基于ＭＡＴＬＡＢ的辅助设计 简述了矩阵分析的重要性，及根轨迹的绘制方法(based on MATLAB aided design outlined the importance of matrix analysis, and root locus mapping methods)

Vector control example of induction machine

基于粒子群模糊聚类算法，相比传统聚类算法，效果好很多(Fuzzy clustering based on particle swarm algorithm, compared with the traditional clustering algorithm, the effect is much better)

IIR数字滤波器的模拟，与一些计算过程的计算机化，是标准课本的一个计算过程的程序化(IIR digital filter simulation, and the computerization of some computational process, is the standard textbook procedure for the calculation of a)

matlab插值与拟合的程序及讲义。对于数值计算的学习有帮助。(matlab interpolation and fitting procedures and handouts. Numerical study for the help.)