Emgu CV 初试

Emgu CV 是.NET平台下对OpenCV图像处理库的封装，也就是.NET版。可以运行在C#、VB、VC++等。

安装完成后需要设置环境变量，比如我安装在D:\Emgu\emgucv-windows-universal-cuda 2.9.0.1922，然后再系统环境变量添加D:\Emgu\emgucv-windows-universal-cuda 2.9.0.192\bin即可

Emgu CV下载地址

http://sourceforge.net/projects/emgucv/files/

找最新的下就行了，傻瓜式安装，选择目录后自动完成安装，然后提示安装VS2008和VS2010的插件，我使用的是VS2010，然后完成操作。

example1：C#下的openCV(Emgu CV)

example2：VS2010+C#+EmguCV读取和录制视频

example3：C#使用EmguCV实现视频读取和播放

Emgu.CV.CvInvoke 的类型初始值设定项引发异常

reference：VS2010、C#、Emgu CV配置 ;

首先确定没有重复安装opencv和emgucv两种，这样有可能在配置path时会出错。emgucv是包含opencv的，使用C#开发的朋友们，可以放心的只安装emgucv。

1、如遇错误提示：tbb_debug.dll找不到

请下载安装Intel TBB库，需要将tbb库或dll文件所在路径，配置带系统环境变量path中。

2、如遇错误提示：“Emgu.CV.CvInvoke”的类型初始值设定项引发异常

（1）、注销或重启计算机，使得系统环境变量中的path生效；

（2）、通过path中设置的路径去寻找对应的dll文件，查看是否存在，是否被成功引用到VS中；

（3）、copy dll文件到debug和release目录中。

（4）、尝试将.Net FrameWork版本降低，如果是4.0的就降低到3.5，如果是3.5的就降低到2.0。

官方解决办法：

（1）安装时注意：

ou can run an AutoIt script that automates much of the process, including installing OpenCV if necessary, and lets you start developing with Visual Studio right away.

Getting the Dependency

Emgu CV use WCF(Windows Communication Foundation) therefore requires .Net 3.0
For version 2.4+ the bundled OpenCV binary is build with Visual Studio 2010, you will needs to installed MSVCRT 9.0 SP1 x86 or MSVCRT 9.0 SP1 x64to resolve the dependency issue.
For Version 2.0+, the bundled OpenCV binary is build with Visual Studio 2008, you will needs to installed MSVCRT 9.0 SP1 to resolve the dependency issue.
For Version 1.5, the bundled OpenCV pre1.1 binary is build with Visual Studio 2005, you will needs to installed MSVCRT 8.0 SP1 to resolve the dependency issue.

Building the Examples

Follow this link to the file server on Source Forge.
Download and extract the windows installer.
Install the software
Go to the Solution folder
- If you are using Visual Studio 2008, browse to VS2008
- If you are using Visual Studio 2010, browse to VS2010
Open Emgu.CV.Example.sln and build the solution. At this point, you should be able to run the example programs.

Creating a New Project in Visual Studio

To use the framework in Visual Studio, you need to

Download and extract the binary files package Emgu.CV.Windows.Binary-{version}.zip

For a Full guide to using the dependencies under Visual Studio and C# see the C# Tutorial.

Core Functionality

Managed Code

Create a new Visual Studio project or use an existing one
Add the two files Emgu.Utils.dll and Emgu.CV.dll to References of the project. as well.
Optionally put the following lines in the top of your code to include the Emgu.CV namespace.

using Emgu.CV; using Emgu.CV.Structure;

Open CV unmanaged dll

Copy the OpenCV dll files: opencv_calib3d{XXX}.dll, opencv_contrib{XXX}.dll, opencv_core{XXX}.dll, opencv_features2d{XXX}.dll, opencv_ffmpeg{XXX}.dll,opencv_flann{XXX}.dll, opencv_gpu{XXX}.dll, opencv_highgui{XXX}.dll, opencv_imgproc{XXX}.dll, opencv_legacy{XXX}.dll, opencv_ml{XXX}.dll,opencv_objdetect{XXX}.dll, opencv_video{XXX}.dll and cvextern.dll to the execution directory, where {XXX} is the OpenCV version number.

（2）The type initializer for 'Emgu.CV.CvInvoke' threw an exception.（Emgu.CV.CvInvoke 的类型初始值设定项引发异常）

If you see this exception, please check the following

Have you installed MSVCRT?

For Version 2.4+, the bundled OpenCV binary is build with Visual Studio 2010, you will needs to installed MSVCRT 10.0 SP1 x86 or MSVCRT 10.0 SP1 x64 to resolve the dependency issue.
For Version 2.0+, the bundled OpenCV binary is build with Visual Studio 2008, you will needs to installed MSVCRT 9.0 SP1 to resolve the dependency issue.
For Version 1.5, the bundled OpenCV pre1.1 binary is build with Visual Studio 2005, you will needs to installed MSVCRT 8.0 SP1 to resolve the dependency issue.

Have you copied the OpenCV dlls to the execution directory?

Make sure the unmanaged DLLs are in the execution directory.
- For Emgu CV version <= 2.1, this means the following dlls:cvXXX.dll, cvauxXXX.dll, cxcoreXXX.dll, highguiXXX.dll, opencv_ffmpegXXX.dll, mlXXX.dllcvextern.dll where XXX is the OpenCV version number.
- For Emgu CV version 2.2, 2.3 this means the following dlls: opencv_calib3dXXX.dll, opencv_contribXXX.dll, opencv_coreXXX.dll, opencv_features2dXXX.dll, opencv_highguiXXX.dll, opencv_imgprocXXX.dll, opencv_legacyXXX.dll, opencv_mlXXX.dll, opencv_objectdetectXXX.dll, opencv_videoXXX.dll where XXX is the OpenCV version number.
- For EMGU CV version >=2.4 cudart64_42_9.dll, cvextern.dll, npp64_42_9.dll, opencv_calib3dXXX.dll, opencv_contribXXX.dll, opencv_coreXXX.dll, opencv_features2dXXX.dll, opencv_flannXXX.dll, opencv_highguiXXX.dll, opencv_imgprocXXX.dll, opencv_legacyXXX.dll, opencv_mlXXX.dll, opencv_nonfreXXX.dll, opencv_objectdetectXXX.dll, opencv_videoXXX.dll, where XXX is the OpenCV version number.

The best way to set up your project is:
- Copy the unmanaged DLLs to your project folder
- Right click on the project, click Add->Existing Item and select all unmanaged DLLs. Add them to the project.
- For each of the included Dlls, left click on it, find the "Copy to Output Directory" option and select "Copy if newer"

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