Question

I have the current code:

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
    Dim Bitmap As New Bitmap("image.png")
    Dim ocr As tessnet2.Tesseract = New tessnet2.Tesseract()
    ocr.SetVariable("tessedit_char_whitelit", "0123456789")
    ocr.Init("c:\", "fra", False)
    Dim result As List(Of tessnet2.Word) = ocr.DoOCR(Bitmap, Rectangle.Empty)
    For Each word As tessnet2.Word In result
        RichTextBox1.Text &= word.Text & "(" & word.Confidence & ") "
    Next
End Sub

I just have a normal RichTextBox and a button on the form. I also have an image in the debug directory called “image.png”.

Every time I run this, the program just closes. I did a step through and all of a sudden a file locater came up asking for “tessnet2.cpp”

I have a reference to the dll. I also don’t know what the ocr.Init(…) line is for.

Any help would be nice!

Answer 1

First of all, thank you very much for your simple but effective code. After 3 days search I found this code for VB (not VC). Of course I copied and pasted it immediately and the same problem occured for me, too. Then:

1. I uninstalled Tesseract 3.xx
2. Checked RegEdit for Tesseract 3.xx and deleted them (whoever want to do this step; please be careful not to destroy anything)

3. Copied tessdll.dll in the same folder.

4. The main problem is:
   ocr.Init("c:\", "fra", False) it should be something like this:
   ocr.Init("c:\tessdata", "fra", False) in fact my real line is:
   ocr.Init(Application.StartupPath & "\tessdata", "eng", False)

5. Noticed that in the folder “…\Visual Studio 2008\Projects….” I still had the same problem and then copied all folder in “D:\Test” folder (of course in this folder I have one more folder: tessdata)

It worked!!!

Hope it helps for you or anyone searching for this problem like me 🙂

Nes