AutoDeskew(Int32,Single) Method

In This Topic

Tries to deskew a GdPicture image to about Â± specified degrees. Deskewing an image can help a lot to do OCR, OMR, barcode detection or just improve the readability of an image.

Syntax

Visual Basic
C#
Delphi
JScript
Managed Extensions for C++
C++/CLI

'Declaration
 
Public Overloads Function AutoDeskew( _
   ByVal ImageID As Integer, _
   ByVal MaxAngleOfResearch As Single _
) As GdPictureStatus

public GdPictureStatus AutoDeskew( 
   int ImageID,
   float MaxAngleOfResearch
)

public function AutoDeskew( 
    ImageID: Integer;
    MaxAngleOfResearch: Single
): GdPictureStatus;

public function AutoDeskew( 
   ImageID : int,
   MaxAngleOfResearch : float
) : GdPictureStatus;

public: GdPictureStatus AutoDeskew( 
   int ImageID,
   float MaxAngleOfResearch
)

public:
GdPictureStatus AutoDeskew( 
   int ImageID,
   float MaxAngleOfResearch
)

Parameters

ImageID: GdPicture image identifier.
MaxAngleOfResearch: Maximum angle of research. IE: set 10 to perform a skew research about Â±10 degrees. A value lower than 15 is suggested. Value used by other overloads is 15.

Return Value

A member of the GdPictureStatus enumeration.

Remarks

This method is useful when you suspect some images to be skewed, but you do not want completely rotated images to be deskewed. It offers control and limitation over the deskew operation.

This method requires the Image Documents component to run.

Example

Deskewing a tiff image.

using (GdPictureImaging gdpictureImaging = new GdPictureImaging())
{
    int imageID = gdpictureImaging.CreateGdPictureImageFromFile("skewed.tif");
 
    gdpictureImaging.AutoDeskew(imageID, 10);
 
    // Let's encode the new tiff with the same mode used by the input image.
    TiffCompression tiffCompression = gdpictureImaging.GetTiffCompression(imageID);
 
    gdpictureImaging.SaveAsTIFF(imageID, "deskewed.tif", tiffCompression);
    gdpictureImaging.ReleaseGdPictureImage(imageID);
}

Reference

GdPictureImaging Class
GdPictureImaging Members
Overload List
GetSkewAngle(Int32,Single) Method