嘿这是我第一次使用这个网站，但我有一个问题。我看到了这个关于让 ocr 与 vb.net 一起工作的很棒的 youtube 视频。这里是网址：
http://www.youtube.com/watch?v=Kjdu8SjEtG0
所以我决定下载 emgu 库，这里是 url：
http://sourceforge.net/projects/emgucv/
我做了视频所说的一切，我得到了这个错误：“创建表单时发生错误。有关详细信息，请参阅 Exception.InnerException。错误是：'Emgu.CV.OCR.Tesseract' 的类型初始化程序引发了异常。”
我什至复制了异常（如果有帮助的话）：
System.InvalidOperationException was unhandled
Message=An error occurred creating the form. See Exception.InnerException for details. The error is: The type initializer for 'Emgu.CV.OCR.Tesseract' threw an exception.
Source=WindowsApplication1
StackTrace:
at WindowsApplication1.My.MyProject.MyForms.Create__Instance__[T](T Instance) in 17d14f5c-a337-4978-8281-53493378c1071.vb:line 190
at WindowsApplication1.My.MyProject.MyForms.get_Form1()
at WindowsApplication1.My.MyApplication.OnCreateMainForm() in C:\Users\UltimateSoul\AppData\Local\Temporary Projects\WindowsApplication1\My Project\Application.Designer.vb:line 35
at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.OnRun()
at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.DoApplicationModel()
at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.Run(String[] commandLine)
at WindowsApplication1.My.MyApplication.Main(String[] Args) in 17d14f5c-a337-4978-8281-53493378c1071.vb:line 81
at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ThreadHelper.ThreadStart()
InnerException: System.TypeInitializationException
Message=The type initializer for 'Emgu.CV.OCR.Tesseract' threw an exception.
Source=Emgu.CV.OCR
TypeName=Emgu.CV.OCR.Tesseract
StackTrace:
at Emgu.CV.OCR.Tesseract..ctor(String dataPath, String language, OcrEngineMode mode)
at WindowsApplication1.Form1..ctor() in C:\Users\UltimateSoul\AppData\Local\Temporary Projects\WindowsApplication1\Form1.vb:line 8
InnerException: System.TypeInitializationException
Message=The type initializer for 'Emgu.CV.CvInvoke' threw an exception.
Source=Emgu.CV
TypeName=Emgu.CV.CvInvoke
StackTrace:
at Emgu.CV.CvInvoke.CV_MAKETYPE(Int32 depth, Int32 cn)
at Emgu.CV.OCR.Tesseract..cctor()
InnerException: System.DllNotFoundException
Message=Unable to load DLL 'opencv_core242': The specified module could not be found. (Exception from HRESULT: 0x8007007E)
Source=Emgu.CV
TypeName=""
StackTrace:
at Emgu.CV.CvInvoke.cvRedirectError(CvErrorCallback errorHandler, IntPtr userdata, IntPtr prevUserdata)
at Emgu.CV.CvInvoke..cctor()
InnerException:
我这几天一直在做，没有找到。请帮忙谢谢！
我很抱歉这里的代码
Imports Emgu.CV
Imports Emgu.Util
Imports Emgu.CV.OCR
Imports Emgu.CV.Structure
Public Class Form1
Dim OCRz As Tesseract = New Tesseract("tessdata", "eng", Tesseract.OcrEngineMode.OEM_TESSERACT_ONLY)
Dim pic As Bitmap = New Bitmap(270, 100)
Dim gfx As Graphics = Graphics.FromImage(pic)
Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
gfx.CopyFromScreen(New Point(Me.Location.X + PictureBox1.Location.X + 4, Me.Location.Y + PictureBox1.Location.Y + 30), New Point(0, 0), pic.Size)
PictureBox1.Image = pic
End Sub
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
OCRz.Recognize(New Image(Of Bgr, Byte)(pic))
RichTextBox1.Text = OCRz.GetText
End Sub
End Class