GdPicture image identifier.
Maximum angle of research. IE: set 10 to perform a skew research about ±10 degrees. A value lower than 15 is suggested. Value used by other overloads is 15.
Color to use to fill background. A suitable color value can be obtained by using the ARGB() method.
Example





In This Topic
GdPicture14 Namespace / GdPictureImaging Class / AutoDeskew Method / AutoDeskew(Int32,Single,Color) Method

AutoDeskew(Int32,Single,Color) Method

In This Topic
Tries to deskew a GdPicture image to about ± specified degrees. This method enables to specify the background color to use. Deskewing an image can help a lot to do OCR, OMR, barcode detection or just improve the readability of an image.
Syntax
'Declaration

 


Public Overloads Function AutoDeskew( _

   ByVal ImageID As Integer, _

   ByVal MaxAngleOfResearch As Single, _

   ByVal BackColor As Color _

) As GdPictureStatus
public GdPictureStatus AutoDeskew( 

   int ImageID,

   float MaxAngleOfResearch,

   Color BackColor

)
public function AutoDeskew( 

    ImageID: Integer;

    MaxAngleOfResearch: Single;

    BackColor: Color

): GdPictureStatus; 
public function AutoDeskew( 

   ImageID : int,

   MaxAngleOfResearch : float,

   BackColor : Color

) : GdPictureStatus;
public: GdPictureStatus AutoDeskew( 

   int ImageID,

   float MaxAngleOfResearch,

   Color BackColor

) 
public:

GdPictureStatus AutoDeskew( 

   int ImageID,

   float MaxAngleOfResearch,

   Color BackColor

)

Parameters

ImageID
GdPicture image identifier.
MaxAngleOfResearch
Maximum angle of research. IE: set 10 to perform a skew research about ±10 degrees. A value lower than 15 is suggested. Value used by other overloads is 15.
BackColor
Color to use to fill background. A suitable color value can be obtained by using the ARGB() method.

Return Value

A member of the GdPictureStatus enumeration.
Remarks
Deskewing often results in "padding" surrounding the image where the dimensions of the image were extended because of the rotation. This method offers a fill color for this padding, so that if you specify it to be the same as the original background color, the deformities would not show.
Example
Deskewing a tiff image. 
using (GdPictureImaging gdpictureImaging = new GdPictureImaging())

{

    int imageID = gdpictureImaging.CreateGdPictureImageFromFile("skewed.tif");

 

    gdpictureImaging.AutoDeskew(imageID, 15, gdpictureImaging.ARGB(255, 255, 255, 255));

 

    // 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);

}
See Also

Reference

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