GdPicture image identifier.
Factor of thresholding reduction. Must be a balue in tha range ]0 ; 1. Suggested value is 0.35. Higher is the factor value lighter should be the resulting image.
Example





In This Topic
GdPicture14 Namespace / GdPictureImaging Class / ConvertTo1BppSauvola Method / ConvertTo1BppSauvola(Int32,Single) Method

ConvertTo1BppSauvola(Int32,Single) Method

In This Topic
Converts a GdPicture image to a 1-bit (black and white) bitmap using the Sauvola local adaptive thresholding method. This method is particularly efficient on documents with poor contrast.
Syntax
'Declaration

 


Public Overloads Function ConvertTo1BppSauvola( _

   ByVal ImageID As Integer, _

   ByVal Factor As Single _

) As GdPictureStatus
public GdPictureStatus ConvertTo1BppSauvola( 

   int ImageID,

   float Factor

)
public function ConvertTo1BppSauvola( 

    ImageID: Integer;

    Factor: Single

): GdPictureStatus; 
public function ConvertTo1BppSauvola( 

   ImageID : int,

   Factor : float

) : GdPictureStatus;
public: GdPictureStatus ConvertTo1BppSauvola( 

   int ImageID,

   float Factor

) 
public:

GdPictureStatus ConvertTo1BppSauvola( 

   int ImageID,

   float Factor

)

Parameters

ImageID
GdPicture image identifier.
Factor
Factor of thresholding reduction. Must be a balue in tha range ]0 ; 1. Suggested value is 0.35. Higher is the factor value lighter should be the resulting image.

Return Value

A member of the GdPictureStatus enumeration.
Remarks

This method requires the Image Documents component to run.

Example
Converts selected image to a 1-bit BW indexed color image, and saves result into a TIF file. 
using (GdPictureImaging gdpictureImaging = new GdPictureImaging())

{

    // Open an image file. An empty string allows the control to prompt for selecting a file.

    int imageID = gdpictureImaging.CreateGdPictureImageFromFile("");

 

    gdpictureImaging.ConvertTo1BppSauvola(imageID, 0.35f);

    gdpictureImaging.SaveAsTIFF(imageID, "output.tif", TiffCompression.TiffCompressionAUTO);

 

    // Release used resources.

    gdpictureImaging.ReleaseGdPictureImage(imageID);

}
See Also

Reference

GdPictureImaging Class
GdPictureImaging Members
Overload List
FxBlackNWhite(Int32,BitonalReduction) Method
FxBlackNWhiteT Method
ConvertTo1Bpp(Int32) Method
ConvertTo1BppAT(Int32) Method