GetOrientation Method (GdPictureOCR)
In This Topic
Computes the page orientation of the image previously set by the
GdPictureOCR.SetImage method. In order to correct the resulting orientation, you need to rotate the image by the following angle: 360 - returned value.
Syntax
'Declaration
Public Function GetOrientation() As Integer
public int GetOrientation()
public function GetOrientation(): Integer;
public function GetOrientation() : int;
public: int GetOrientation();
public:
int GetOrientation();
Return Value
The page orientation, in degrees, determining the clockwise rotation applied to the given image. The returned value can only be 0, 90, 180 or 270.
Please always use the GdPictureOCR.GetStat method to determine if this method has been successful.
Example
How to correct the page orientation for the given image before processing the OCR.
Dim caption As String = "Example: GetOrientation"
Using gdpictureOCR As GdPictureOCR = New GdPictureOCR
'Setting these properties is mandatory for using this method.
'Specify your path.
gdpictureOCR.ResourcesFolder = "D:\\GdPicture.NET 14\\Redist\\OCR"
'Specify your language.
gdpictureOCR.AddLanguage(OCRLanguage.English)
'Load the image you want to process.
Dim gdpictureImaging As GdPictureImaging = New GdPictureImaging
'The standard open file dialog displays to allow you to select the file.
Dim image As Integer = gdpictureImaging.CreateGdPictureImageFromFile("")
If gdpictureImaging.GetStat = GdPictureStatus.OK AndAlso
gdpictureOCR.SetImage(image) = GdPictureStatus.OK Then
'Setting up the image is mandatory.
'Check the image orientation.
Dim orientation As Integer = gdpictureOCR.GetOrientation()
If gdpictureOCR.GetStat = GdPictureStatus.OK Then
If orientation <> 0 Then
If gdpictureImaging.RotateAngle(image, 360 - orientation) <> GdPictureStatus.OK Then
MessageBox.Show("The image is rotated, but the RotateAngle() method has failed with the status: " + gdpictureImaging.GetStat.ToString, caption)
Else
orientation = 0
End If
End If
'Continue if image is properly oriented.
If orientation = 0 Then
'Set up the required OCR parameters and continue with the process.
End If
Else
MessageBox.Show("The GetOrientation() method has failed with the status: " + gdpictureOCR.GetStat.ToString, caption)
End If
'Release the used image.
gdpictureImaging.ReleaseGdPictureImage(image)
Else
MessageBox.Show("The error occurred when setting up the image: " + gdpictureImaging.GetStat().ToString() + "/" + gdpictureOCR.GetStat().ToString(), caption)
End If
gdpictureImaging.Dispose()
End Using
string caption = "Example: GetOrientation";
using (GdPictureOCR gdpictureOCR = new GdPictureOCR())
{
//Setting these properties is mandatory to be able to using this method.
gdpictureOCR.ResourcesFolder = "D:\\GdPicture.NET 14\\Redist\\OCR"; //Specify your path.
gdpictureOCR.AddLanguage(OCRLanguage.English); //Specify your language.
//Load the image you want to process.
GdPictureImaging gdpictureImaging = new GdPictureImaging();
//The standard open file dialog displays to allow you to select the file.
int image = gdpictureImaging.CreateGdPictureImageFromFile("");
if ((gdpictureImaging.GetStat() == GdPictureStatus.OK) &&
(gdpictureOCR.SetImage(image) == GdPictureStatus.OK)) //Setting up the image is mandatory.
{
//Check the image orientation.
int orientation = gdpictureOCR.GetOrientation();
if (gdpictureOCR.GetStat() == GdPictureStatus.OK)
{
if (orientation != 0)
{
if (gdpictureImaging.RotateAngle(image, 360 - orientation) != GdPictureStatus.OK)
MessageBox.Show("The image is rotated, but the RotateAngle() method has failed with the status: " + gdpictureImaging.GetStat().ToString(), caption);
else
orientation = 0;
}
//Continue if image is properly oriented.
if (orientation == 0)
{
//Set up the required OCR parameters and continue with the process.
}
}
else
MessageBox.Show("The GetOrientation() method has failed with the status: " + gdpictureOCR.GetStat().ToString(), caption);
//Release the used image.
gdpictureImaging.ReleaseGdPictureImage(image);
}
else
{
MessageBox.Show("The error occurred when setting up the image: " + gdpictureImaging.GetStat().ToString() + "/" + gdpictureOCR.GetStat().ToString(), caption);
}
gdpictureImaging.Dispose();
}
Example
How to correct the page orientation for the given image before processing the OCR.
Dim caption As String = "Example: GetOrientation"
Using gdpictureOCR As GdPictureOCR = New GdPictureOCR
'Setting these properties is mandatory for using this method.
'Specify your path.
gdpictureOCR.ResourcesFolder = "D:\\GdPicture.NET 14\\Redist\\OCR"
'Specify your language.
gdpictureOCR.AddLanguage(OCRLanguage.English)
'Load the image you want to process.
Dim gdpictureImaging As GdPictureImaging = New GdPictureImaging
'The standard open file dialog displays to allow you to select the file.
Dim image As Integer = gdpictureImaging.CreateGdPictureImageFromFile("")
If gdpictureImaging.GetStat = GdPictureStatus.OK AndAlso
gdpictureOCR.SetImage(image) = GdPictureStatus.OK Then
'Setting up the image is mandatory.
'Check the image orientation.
Dim orientation As Integer = gdpictureOCR.GetOrientation()
If gdpictureOCR.GetStat = GdPictureStatus.OK Then
If orientation <> 0 Then
If gdpictureImaging.RotateAngle(image, 360 - orientation) <> GdPictureStatus.OK Then
MessageBox.Show("The image is rotated, but the RotateAngle() method has failed with the status: " + gdpictureImaging.GetStat.ToString, caption)
Else
orientation = 0
End If
End If
'Continue if image is properly oriented.
If orientation = 0 Then
'Set up the required OCR parameters and continue with the process.
End If
Else
MessageBox.Show("The GetOrientation() method has failed with the status: " + gdpictureOCR.GetStat.ToString, caption)
End If
'Release the used image.
gdpictureImaging.ReleaseGdPictureImage(image)
Else
MessageBox.Show("The error occurred when setting up the image: " + gdpictureImaging.GetStat().ToString() + "/" + gdpictureOCR.GetStat().ToString(), caption)
End If
gdpictureImaging.Dispose()
End Using
string caption = "Example: GetOrientation";
using (GdPictureOCR gdpictureOCR = new GdPictureOCR())
{
//Setting these properties is mandatory to be able to using this method.
gdpictureOCR.ResourcesFolder = "D:\\GdPicture.NET 14\\Redist\\OCR"; //Specify your path.
gdpictureOCR.AddLanguage(OCRLanguage.English); //Specify your language.
//Load the image you want to process.
GdPictureImaging gdpictureImaging = new GdPictureImaging();
//The standard open file dialog displays to allow you to select the file.
int image = gdpictureImaging.CreateGdPictureImageFromFile("");
if ((gdpictureImaging.GetStat() == GdPictureStatus.OK) &&
(gdpictureOCR.SetImage(image) == GdPictureStatus.OK)) //Setting up the image is mandatory.
{
//Check the image orientation.
int orientation = gdpictureOCR.GetOrientation();
if (gdpictureOCR.GetStat() == GdPictureStatus.OK)
{
if (orientation != 0)
{
if (gdpictureImaging.RotateAngle(image, 360 - orientation) != GdPictureStatus.OK)
MessageBox.Show("The image is rotated, but the RotateAngle() method has failed with the status: " + gdpictureImaging.GetStat().ToString(), caption);
else
orientation = 0;
}
//Continue if image is properly oriented.
if (orientation == 0)
{
//Set up the required OCR parameters and continue with the process.
}
}
else
MessageBox.Show("The GetOrientation() method has failed with the status: " + gdpictureOCR.GetStat().ToString(), caption);
//Release the used image.
gdpictureImaging.ReleaseGdPictureImage(image);
}
else
{
MessageBox.Show("The error occurred when setting up the image: " + gdpictureImaging.GetStat().ToString() + "/" + gdpictureOCR.GetStat().ToString(), caption);
}
gdpictureImaging.Dispose();
}
See Also
