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SIFT_YantaoNoemie

于 2013-04-02 发布文件大小:2412KB

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根据sift算法经典文章得到的matlab算法程序，可以直接运行。(According to the the sift algorithm classic article Matlab algorithm can be run directly.)

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one
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.)

2013-11-26 16:24:18下载

积分：1
matlab3
这是一个关于matlab里主要函数和主要命令的文档，里面介绍的比较详尽～希望对大家有用(It is a major function in matlab and major command document, which described in detail to all of us ~ I hope useful)

2008-01-05 11:05:07下载

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介绍如何用matlab设计fir滤波器，很详细！！！！！！！！！！！！！！！！！(A great progress in the discipline of digital processing is the research on design method of digital filter. FIR digital filter plays a significant part in the processing of digital signal because it can realize linear phase so conveniently that the group delay doesn’t vary with frequency. In the modern electrical system, the FIR digital filter is applications for its good linear phase character.)

2010-10-01 19:16:54下载

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CCZFfinal
说明：自己编写的zero forcing equalizer，完全可用(I have written zero forcing equalizer, fully available)

2008-12-03 05:35:22下载

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用matlab编写的bpsk信号的循环谱估计程序
用matlab编写的bpsk信号的循环谱估计程序，适合给初学者参考。(BPSK signal s Matlab computer program written in cyclic spectrum,for new learners reference.)

2013-04-23 20:22:17下载

积分：1
hmkongzhilizi
老师教我的滑模变结构matlab仿真程序的几个例子，该程序易读，易移植(Teaching my sliding mode a few examples of matlab simulation program, the program to read, easy to transplant)

2010-10-08 16:56:35下载

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2010-05-10 17:21:50下载

积分：1
pinpubianhuan
对图像做傅里叶频谱变换，可以求出图像的频谱分布，实现频谱中心化(Fourier transform spectrum of the image to do, you can find the spectral distribution of the image to achieve the center of the spectrum)

2011-10-08 21:20:12下载

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this file is for newcomers to learn matlab programming

2012-10-17 02:18:02下载

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用matlab编写的savitzky-Golay曲线平滑滤波函数(savitzky-Golay smoothing function developed by matlab)

2015-12-17 14:27:32下载

积分：1

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SIFT_YantaoNoemie

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