Emgu CV 无法在部署的项目中加载 DLL 'cvextern'

Question

我在 ASP.NET 项目中使用 EmguCV 进行人脸检测。当我运行来自 Visual Studio 的项目时，一切正常。

然后我通过文件夹配置文件发布了发布版本，然后将这个发布的版本上传到 smarterasp.net。

应用程序运行正常。但是当应用程序试图检测图像中的人脸时，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()<---

有意思的是，我的Home Controller和其他文件的本地路径异常：

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？为什么在部署的应用程序中某处有我的本地路径？

我以前从未部署过项目，所以 100% 我犯了一些愚蠢的错误。我做错了什么？

Answer 1

简单的答案是，无论您的 exe 文件在哪里，EmguCV DLL 和 OpenCV DLL 的 ALL 也必须在。开发过程中发生的事情与部署完全无关。

我发现将 EmguCV DLL 放在我的 EXE 文件夹中很方便，并将所有 OpenCV dll 放在一个名为 x64 的文件夹中。 x64 文件夹也与您的 exe 位于同一文件夹中。

道格

Emgu CV 无法在部署的项目中加载 DLL 'cvextern'

Emgu CV Unable to load DLL 'cvextern' in deployed project

c#

asp.net

deployment

emgucv