Dim caption As String = "Example: GetCharacterCount"
Dim gdpictureOCR As GdPictureOCR = New GdPictureOCR
Dim gdpicturePDF As GdPicturePDF = New GdPicturePDF
'Load the PDF document.
If gdpicturePDF.LoadFromFile("input.pdf", False) = GdPictureStatus.OK Then
'Select the first page.
gdpicturePDF.SelectPage(1)
'Render this page to a 200 DPI image.
Dim image As Integer = gdpicturePDF.RenderPageToGdPictureImage(200, True)
If gdpicturePDF.GetStat = GdPictureStatus.OK AndAlso
gdpictureOCR.SetImage(image) = GdPictureStatus.OK Then
'Setting up the image is mandatory.
'Set the New origin for better coordinates handling.
gdpicturePDF.SetOrigin(PdfOrigin.PdfOriginTopLeft)
gdpicturePDF.SetLineColor(Color.Orchid)
gdpicturePDF.SetLineWidth(2)
'Set up the OCR parameters.
gdpictureOCR.ResourcesFolder = "C:\Path\To\GdPicture.NET 14\Redist\OCR"
gdpictureOCR.AddLanguage(OCRLanguage.English)
gdpictureOCR.OCRMode = OCRMode.FavorAccuracy
'Set up the OCR context and the character list.
gdpictureOCR.Context = OCRContext.OCRContextSingleLine
gdpictureOCR.CharacterSet = "0123456789"
'Set up the area to be processed by the OCR.
gdpictureOCR.SetROI(100, 100, 200, 50)
'Run the OCR process to recognize the phone number.
Dim resID As String = gdpictureOCR.RunOCR()
If gdpictureOCR.GetStat = GdPictureStatus.OK Then
Dim charCount As Integer = gdpictureOCR.GetCharacterCount(resID)
If gdpictureOCR.GetStat() = GdPictureStatus.OK Then
Dim message As String = "The number of recognized characters: " + charCount.ToString()
Dim phonenumber As String = ""
Dim left As Integer = 0, right As Integer = 0, top As Integer = 0, bottom As Integer = 0
For i As Integer = 0 To charCount - 1
phonenumber = phonenumber + gdpictureOCR.GetCharacterValue(resID, i)
If i = 0 Then
left = gdpictureOCR.GetCharacterLeft(resID, i)
top = gdpictureOCR.GetCharacterTop(resID, i)
End If
If i = charCount - 1 Then
right = gdpictureOCR.GetCharacterRight(resID, i)
bottom = gdpictureOCR.GetCharacterBottom(resID, i)
End If
Next
message = message + vbCrLf + "The phone number is: " + phonenumber
If gdpicturePDF.DrawRectangle(left, top, right - left, bottom - top, False, True) = GdPictureStatus.OK Then
message = message + " Drawn: yes" + vbCrLf
Else
message = message + " Drawn: no" + vbCrLf
End If
MessageBox.Show(message, caption)
'Continue with analyzing the result ...
'Save the page with drawn recognized phone number to the new PDF document.
If gdpicturePDF.SaveToFile("output.pdf") = GdPictureStatus.OK Then
MessageBox.Show("Done!", caption)
Else
MessageBox.Show("The file can't be saved. Status: " + gdpicturePDF.GetStat().ToString(), caption)
End If
Else
MessageBox.Show("The GetCharacterCount() method has failed with the status: " + gdpictureOCR.GetStat().ToString(), caption)
End If
Else
MessageBox.Show("The error occurred when running the OCR. Status: " + gdpictureOCR.GetStat().ToString(), caption)
End If
'Release the image.
GdPictureDocumentUtilities.DisposeImage(image)
Else
MessageBox.Show("The error occurred when creating or setting up the image. Status: " + gdpicturePDF.GetStat().ToString() + "/" + gdpictureOCR.GetStat().ToString(), caption)
End If
'Close the document.
gdpicturePDF.CloseDocument()
Else
MessageBox.Show("The file can't be loaded. Status: " + gdpicturePDF.GetStat().ToString(), caption)
End If
'Release resources.
gdpictureOCR.ReleaseOCRResults()
gdpictureOCR.Dispose()
gdpicturePDF.Dispose()
string caption = "Example: GetCharacterCount";
GdPictureOCR gdpictureOCR = new GdPictureOCR();
GdPicturePDF gdpicturePDF = new GdPicturePDF();
//Load the PDF document.
if (gdpicturePDF.LoadFromFile("input.pdf", false) == GdPictureStatus.OK)
{
//Select the first page.
gdpicturePDF.SelectPage(1);
//Render this page to a 200 DPI image.
int image = gdpicturePDF.RenderPageToGdPictureImage(200, true);
if ((gdpicturePDF.GetStat() == GdPictureStatus.OK) &&
(gdpictureOCR.SetImage(image) == GdPictureStatus.OK)) //Setting up the image is mandatory.
{
//Set the new origin for better coordinates handling.
gdpicturePDF.SetOrigin(PdfOrigin.PdfOriginTopLeft);
gdpicturePDF.SetLineColor(Color.Orchid);
gdpicturePDF.SetLineWidth(2);
//Set up the OCR parameters.
gdpictureOCR.ResourcesFolder = "C:\\Path\\To\\GdPicture.NET 14\\Redist\\OCR";
gdpictureOCR.AddLanguage(OCRLanguage.English);
gdpictureOCR.OCRMode = OCRMode.FavorAccuracy;
//Set up the OCR context and the character list.
gdpictureOCR.Context = OCRContext.OCRContextSingleLine;
gdpictureOCR.CharacterSet = "0123456789";
//Set up the area to be processed by the OCR.
gdpictureOCR.SetROI(100, 100, 200, 50);
//Run the OCR process to recognize the phone number.
string resID = gdpictureOCR.RunOCR();
if (gdpictureOCR.GetStat() == GdPictureStatus.OK)
{
int charCount = gdpictureOCR.GetCharacterCount(resID);
if (gdpictureOCR.GetStat() == GdPictureStatus.OK)
{
string message = "The number of recognized characters: " + charCount.ToString();
string phonenumber = "";
int left = 0, right = 0, top = 0, bottom = 0;
for (int i = 0; i < charCount; i++)
{
phonenumber = phonenumber + gdpictureOCR.GetCharacterValue(resID, i);
if (i == 0)
{
left = gdpictureOCR.GetCharacterLeft(resID, i);
top = gdpictureOCR.GetCharacterTop(resID, i);
}
if (i == charCount - 1)
{
right = gdpictureOCR.GetCharacterRight(resID, i);
bottom = gdpictureOCR.GetCharacterBottom(resID, i);
}
}
message = message + "\nThe phone number is: " + phonenumber;
if (gdpicturePDF.DrawRectangle(left, top, right - left, bottom - top, false, true) == GdPictureStatus.OK)
message = message + " Drawn: yes\n";
else
message = message + " Drawn: no\n";
MessageBox.Show(message, caption);
//Continue with analyzing the result ...
//Save the page with drawn recognized phone number to the new PDF document.
if (gdpicturePDF.SaveToFile("output.pdf") == GdPictureStatus.OK)
MessageBox.Show("Done!", caption);
else
MessageBox.Show("The file can't be saved. Status: " + gdpicturePDF.GetStat().ToString(), caption);
}
else
MessageBox.Show("The GetCharacterCount() method has failed with the status: " + gdpictureOCR.GetStat().ToString(), caption);
}
else
MessageBox.Show("The error occurred when running the OCR. Status: " + gdpictureOCR.GetStat().ToString(), caption);
//Release the image.
GdPictureDocumentUtilities.DisposeImage(image);
}
else
MessageBox.Show("The error occurred when creating or setting up the image. Status: " + gdpicturePDF.GetStat().ToString() + "/" + gdpictureOCR.GetStat().ToString(), caption);
//Close the document.
gdpicturePDF.CloseDocument();
}
else
MessageBox.Show("The file can't be loaded. Status: " + gdpicturePDF.GetStat().ToString(), caption);
//Release resources.
gdpictureOCR.ReleaseOCRResults();
gdpictureOCR.Dispose();
gdpicturePDF.Dispose();