‘使用OCR后图片一直被占用，导致后面无法更新图片
Public Class Form1
'使用Tesseract進行OCR
Function TesseractOCR(img As Bitmap) As String
Try
Dim ocr As New tessnet2.Tesseract
ocr.SetVariable("tessedit_char_whitelist", "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789")
ocr.Init(".\tessdata", "eng", False)
Dim result As List(Of tessnet2.Word) = ocr.DoOCR(img, Rectangle.Empty)
Dim str As String = ""
For i As Integer = 0 To result.Count - 1
str &= result(i).Text
Next
Return str
img = Nothing
Catch ex As Exception
Throw ex
End Try
Return String.Empty
End Function
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
Dim img As New Bitmap(Image.FromFile("D:\newtest2.bmp"))
TextBox1.Text = TesseractOCR(img)
End Sub
Private Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click
Dim SngPer As Integer
SngPer = CInt(TextBox2.Text)
Dim PicOld As Image = Image.FromFile("D:\test2.bmp")
Dim PicNew As New System.Drawing.Bitmap(PicOld, PicOld.Width * SngPer, PicOld.Height * SngPer)
PicNew.Save("D:\newtest2.bmp", Drawing.Imaging.ImageFormat.Bmp)
End Sub
End Class
