如何使FFTW ++在Windows上运行? (对于假人) [英] How to get FFTW++ working on windows? (for dummies)

问题描述

我正在使用Windows 10和Visual Studio2015.在C ++中，我需要获取图像的傅立叶变换，以便在其上应用滤镜.看来FFTW ++是实现此目的的理想解决方案，但是我无法对其进行编译，这使我发疯.我是编程的新手，所以我不知道这有多尴尬.

I'm using Windows 10 and Visual Studio 2015. In C++, I need to get the Fourier-transform of an image for applying filters on it. It seems that FFTW++ is the ideal solution for this, however I can't get it to compile, and its driving me mad. I'm relatively new to programming so I don't know how embarrassing this is.

我在Visual Studio中使用了NuGet函数来获取FFTW库. 由于我在NuGet上找不到它，因此我从以下链接下载了FFTW +内容: https://sourceforge.net/projects/fftwpp/ 我将下载内容复制到项目文件夹，并将头文件包含在解决方案资源管理器中.但是它没有编译，引发了许多奇怪的错误(例如:在seconds.h中，它说一些获取时区的函数已过时，而在fftww ++.h中，它说std :: max是非法的)

I used the NuGet function in Visual Studio to get the FFTW library. Since I couldn't find it on NuGet I downloaded the FFTW+ stuff from the following link: https://sourceforge.net/projects/fftwpp/ I copied the content of the download to the project folder, and included the header files in the solution explorer. But it didn't compile, thrown many-many weird errors (for example: in the seconds.h it said that some function which gets the timezone is obsolete, and in the fftww++.h it said that std::max is illegal).

因此，在看到这行不通之后，我回到了FFTW网站，并尝试使用Windows安装指南. http://www.fftw.org/install/windows.html 我下载了64位版本，但我完全不知道如何执行库导入操作，甚至不知道该执行什么操作. i.imgur.com/Qs7mFQT.png 这就是我所得到的，我完全迷路了.

So after seeing that this isn't going to work I went back to the FFTW website, and tried using the Windows installation guide. http://www.fftw.org/install/windows.html I downloaded the 64-bit version, and I have absolutely no idea how to do the library import thing, or even what it does. i.imgur.com/Qs7mFQT.png This is all I get, I'm completely lost.

如何获取它进行编译? 请，如果可以的话:给我写一个尽可能详细的使用说明，我可能很愚蠢，但是我根本不知道发生了什么，而且我在Google上找不到任何类似的教程.

How can I get it to compile? Please if you can: write me an explanation as detailed as possible on how to use this thing, I may be dumb but I literally have no idea what is going on, and I can't find any tutorial-like on Google.

推荐答案

获取64位预编译的FFTW 3.3.5 Windows DLL

1. 从 fftw-3.3.5-dll64.zip <下载/a>
2. 解压缩文件.

创建导入库(.lib文件)

1. 有关FFTW的官方说明，请此处.
2. 有关如何将DLL链接到Visual Studio C ++程序的背景，此MSDN文章将可执行文件链接到DLL ，尤其是有关 隐式的部分链接 很有帮助.
3. 在解压缩位置的README-WINDOWS中也很有帮助.

4. 打开Visual Studio开发人员命令提示符

1. The official FFTW instructions are here.
2. For background on how to link a DLL to a Visual Studio C++ program this MSDN article Linking an Executable to a DLL especially the part about implicit linking is helpful.
3. Also helpful, in the unzip location, README-WINDOWS.

4. Open the Visual Studio Developer Command prompt

• 导航到开始-> 所有应用-> Visual Studio 2015 -> 开发人员命令提示符
• 在我的计算机上，位置为C:\ Program Files(x86)\ Microsoft Visual Studio 14.0 \ Common7 \ Tools \ VsDevCmd.bat

• Navigate to Start -> All Apps -> Visual Studio 2015 -> Developer Command prompt
• On my machine the location is C:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\Tools\VsDevCmd.bat

导航至解压缩位置并输入

Navigate to the unzip location and type

lib /machine:x64 /def:libfftw3-3.def

(对于单精度或双精度双精度，请使用libfftw3f-3.def或libfftw3l-3.def)

(for single or long-double precision use libfftw3f-3.def or libfftw3l-3.def)

• 这将产生libfftw3-3.lib
• 请注意，这是针对x64的.

打开Visual Studio并创建一个C ++控制台应用程序

1. 创建C ++控制台应用程序
2. 接受所有默认设置
3. 将解决方案平台设置为x64

1. Create a C++ Console application
2. Accept all the default settings
3. Set the solution platform to x64

告诉Visual Studio哪里可以找到FFTW头文件.

(取自此 SO答案.)

执行此操作的方法有多种，这是一种方法.

There are various ways to do this, here is one way.

1. 在解决方案资源管理器中，右键单击项目并选择属性.
2. 添加其他包含目录.这将是解压缩位置.

1. In the solution explorer, right click on the project and select properties.
2. Add additional include directories. This will be the unzip location.

(或者，可以将.h文件复制到Visual Studio项目文件夹中.)

(Alternatively, the .h file can be copied into the Visual Studio project folder.)

告诉Visual Studio哪里可以找到FFTW导入库.

1. 右键单击项目，然后选择属性.
2. 添加其他库目录.这将是解压缩位置.
3. 添加其他依赖项.键入先前创建的.lib文件(libfftw3-3.lib).

1. Right click on the project and select properties.
2. Add additional library directories. This will be the unzip location.
3. Add additional dependency. Type in the .lib file created earlier (libfftw3-3.lib).

创建示例程序

(摘自 FFTW教程. )

#include "stdafx.h"

#include <fftw3.h>

int main()
{
    fftw_complex *in, *out;
    fftw_plan p;

    int N = 32;

    in = (fftw_complex*)fftw_malloc(sizeof(fftw_complex) * N);
    out = (fftw_complex*)fftw_malloc(sizeof(fftw_complex) * N);
    p = fftw_plan_dft_1d(N, in, out, FFTW_FORWARD, FFTW_ESTIMATE);

    fftw_execute(p); /* repeat as needed */

    fftw_destroy_plan(p);
    fftw_free(in); fftw_free(out);

    return 0;
}

编译

告诉Windows在哪里找到FFTW DLL 最简单的方法是将FFTW DLL(libfftw3-3.dll)从解压缩位置复制到Visual Studio输出文件夹.

Tell Windows where to find the FFTW DLL The easiest way is to copy the FFTW DLL (libfftw3-3.dll) from the unzip location to the Visual Studio output folder.

1. 在Visual Studio中，右键单击解决方案，然后选择在File Exporer中打开文件夹.
2. 导航到.exe输出文件夹(例如fftw_helloworld2 \ x64 \ Debug)
3. 复制DLL libfftw3-3.dll

1. In Visual Studio right click on the solution and select Open Folder in File Exporer.
2. Navigate to the .exe output folder (e.g. fftw_helloworld2\x64\Debug)
3. Copy the DLL libfftw3-3.dll

运行/调试

1. 设置断点
2. 按F5或

1. Set a breakpoint
2. Press F5 or

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