Emgu CV无法在部署的项目中加载DLL文件'cvextern'

Question

我正在ASP.NET项目中使用EmguCV进行人脸检测。当我从Visual Studio运行项目时，一切都正常。

然后，我通过文件夹配置文件发布了发布版本，并将此发布的版本上传到smarterasp.net。

应用程序通常工作。但是，当应用程序尝试在图像中检测人脸时，会抛出异常。

System.AggregateException: One or more errors occurred. ---> System.TypeInitializationException: The type initializer for 'Emgu.CV.CvInvoke' threw an exception. ---> System.DllNotFoundException: Unable to load DLL 'cvextern': The specified module could not be found. (Exception from HRESULT: 0x8007007E)
   at Emgu.CV.CvInvoke.RedirectError(CvErrorCallback errorHandler, IntPtr userdata, IntPtr prevUserdata)
   at Emgu.CV.CvInvoke..cctor()
   --- End of inner exception stack trace ---
   at Emgu.CV.Image`2.AllocateData(Int32 rows, Int32 cols, Int32 numberOfChannels)
   at Emgu.CV.Image`2.set_Bitmap(Bitmap value)
   at FaceDetection.FaceDetector.GetFaces(Bitmap img) in D:\Programming\C#Projs\FacelessBrowserTT_DIV_CONTAINER\FaceDetection\FaceDetector.cs:line 22
   at ImageModification.FaceBlurModificator.Modify(Image img) in D:\Programming\C#Projs\FacelessBrowserTT_DIV_CONTAINER\ImageModification\FaceBlurModificator.cs:line 21
   at FacelessBrowserTT.Controllers.HomeController.<>c__DisplayClass4_0.<PreparePage>b__1() in D:\Programming\C#Projs\FacelessBrowserTT_DIV_CONTAINER\FacelessBrowserTT\Controllers\HomeController.cs:line 81
   at System.Threading.Tasks.Task.InnerInvoke()
   at System.Threading.Tasks.Task.Execute()
   --- End of inner exception stack trace ---
   at System.Threading.Tasks.Task.ThrowIfExceptional(Boolean includeTaskCanceledExceptions)
   at System.Threading.Tasks.Task.Wait(Int32 millisecondsTimeout, CancellationToken cancellationToken)
   at FacelessBrowserTT.Controllers.HomeController.<PreparePage>d__4.MoveNext() in D:\Programming\C#Projs\FacelessBrowserTT_DIV_CONTAINER\FacelessBrowserTT\Controllers\HomeController.cs:line 86
---> (Inner Exception #0) System.TypeInitializationException: The type initializer for 'Emgu.CV.CvInvoke' threw an exception. ---> System.DllNotFoundException: Unable to load DLL 'cvextern': The specified module could not be found. (Exception from HRESULT: 0x8007007E)
   at Emgu.CV.CvInvoke.RedirectError(CvErrorCallback errorHandler, IntPtr userdata, IntPtr prevUserdata)
   at Emgu.CV.CvInvoke..cctor()
   --- End of inner exception stack trace ---
   at Emgu.CV.Image`2.AllocateData(Int32 rows, Int32 cols, Int32 numberOfChannels)
   at Emgu.CV.Image`2.set_Bitmap(Bitmap value)
   at FaceDetection.FaceDetector.GetFaces(Bitmap img) in D:\Programming\C#Projs\FacelessBrowserTT_DIV_CONTAINER\FaceDetection\FaceDetector.cs:line 22
   at ImageModification.FaceBlurModificator.Modify(Image img) in D:\Programming\C#Projs\FacelessBrowserTT_DIV_CONTAINER\ImageModification\FaceBlurModificator.cs:line 21
   at FacelessBrowserTT.Controllers.HomeController.<>c__DisplayClass4_0.<PreparePage>b__1() in D:\Programming\C#Projs\FacelessBrowserTT_DIV_CONTAINER\FacelessBrowserTT\Controllers\HomeController.cs:line 81
   at System.Threading.Tasks.Task.InnerInvoke()
   at System.Threading.Tasks.Task.Execute()<---

有趣的是，在异常中有我的Home Controller和其他文件的本地路径：

D:\Programming\C#Projs\FacelessBrowserTT_DIV_CONTAINER\FacelessBrowserTT\Controllers\HomeController.cs
D:\Programming\C#Projs\FacelessBrowserTT_DIV_CONTAINER\FaceDetection\FaceDetector.cs
...

也许这就是原因？为什么我的本地路径出现在部署的应用程序中？

我以前从未部署过项目，所以肯定有一些愚蠢的错误。我做错了什么？

- Defake

Answer 1

简单来说，无论您的exe文件在哪里，所有EmguCV DLL和OpenCV DLL也必须在同一位置。开发过程中发生的事情对部署没有任何影响。

我发现将EmguCV DLL放在我的EXE文件夹中，并在名为x64的文件夹中放置所有OpenCV dll非常方便。x64文件夹也位于与您的exe相同的文件夹中。

道格

- AeroClassics