GdPicture.NET.14.API~GdPicture14.GdPictureImaging~IsBlank(Int32,Single,Boolean,Boolean) - IsBlank(Int32,Single,Boolean,Boolean) Method -

public bool IsBlank( 
   int ImageID,
   float Confidence,
   bool AccountForMargins,
   bool AccountForPunchHoles
)

public function IsBlank( 
    ImageID: Integer;
    Confidence: Single;
    AccountForMargins: Boolean;
    AccountForPunchHoles: Boolean
): Boolean;

public function IsBlank( 
   ImageID : int,
   Confidence : float,
   AccountForMargins : boolean,
   AccountForPunchHoles : boolean
) : boolean;

public: bool IsBlank( 
   int ImageID,
   float Confidence,
   bool AccountForMargins,
   bool AccountForPunchHoles
)

public:
bool IsBlank( 
   int ImageID,
   float Confidence,
   bool AccountForMargins,
   bool AccountForPunchHoles
)

'Declaration
 
Public Overloads Function IsBlank( _
   ByVal ImageID As Integer, _
   ByVal Confidence As Single, _
   ByVal AccountForMargins As Boolean, _
   ByVal AccountForPunchHoles As Boolean _
) As Boolean

Parameters

ImageID: GdPicture image identifier.
Confidence: Confidence threshold in the range [0 - 100]. Suggested value is 99.5.
AccountForMargins: Specifies if the algorithm must drop the margins during the calculation (slower). Yields more accurate results for images with margins. Default value is true.
AccountForPunchHoles: Specifies if the algorithm must drop the punch holes during the calculation (slower). Yields more accurate results for images with punch holes. Default value is true.

Return Value

True if it is a blank image, else False.

Use the GetStat() method to check if this method has completed successfully.

Removing the blank pages from a tiff document.

C#

using (GdPictureImaging gdpictureImaging = new GdPictureImaging())
{
    // LoadInMemory parameter is set to true in order to be able to update the input file.
    int imageID = gdpictureImaging.TiffCreateMultiPageFromFile("multipage.tif", true);
    int pageCount = gdpictureImaging.TiffGetPageCount(imageID);
    int pageNo = 1;
    while (pageNo <= pageCount)
    {
        gdpictureImaging.TiffSelectPage(imageID, pageNo);
        if (gdpictureImaging.IsBlank(imageID, 95, false, false))
        {
            gdpictureImaging.TiffDeletePage(imageID, pageNo);
            pageCount--;
        }
        else
        {
            pageNo++;
        }
    }
    gdpictureImaging.TiffSaveMultiPageToFile(imageID, "multipage.tif", TiffCompression.TiffCompressionAUTO);
    gdpictureImaging.ReleaseGdPictureImage(imageID);
}

Reference

GdPictureImaging Class
GdPictureImaging Members
Overload List