RemoveBlob(Int32,Int32,Int32,Int32,Int32,BlobRemoveMode) Method

In This Topic

Removes blobs and ink blobs with a specified size margin.

Syntax

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

'Declaration
 
Public Overloads Function RemoveBlob( _
   ByVal ImageID As Integer, _
   ByVal MinBlobWidth As Integer, _
   ByVal MinBlobHeight As Integer, _
   ByVal MaxBlobWidth As Integer, _
   ByVal MaxBlobHeight As Integer, _
   ByVal Mode As BlobRemoveMode _
) As GdPictureStatus

public GdPictureStatus RemoveBlob( 
   int ImageID,
   int MinBlobWidth,
   int MinBlobHeight,
   int MaxBlobWidth,
   int MaxBlobHeight,
   BlobRemoveMode Mode
)

public function RemoveBlob( 
    ImageID: Integer;
    MinBlobWidth: Integer;
    MinBlobHeight: Integer;
    MaxBlobWidth: Integer;
    MaxBlobHeight: Integer;
    Mode: BlobRemoveMode
): GdPictureStatus;

public function RemoveBlob( 
   ImageID : int,
   MinBlobWidth : int,
   MinBlobHeight : int,
   MaxBlobWidth : int,
   MaxBlobHeight : int,
   Mode : BlobRemoveMode
) : GdPictureStatus;

public: GdPictureStatus RemoveBlob( 
   int ImageID,
   int MinBlobWidth,
   int MinBlobHeight,
   int MaxBlobWidth,
   int MaxBlobHeight,
   BlobRemoveMode Mode
)

public:
GdPictureStatus RemoveBlob( 
   int ImageID,
   int MinBlobWidth,
   int MinBlobHeight,
   int MaxBlobWidth,
   int MaxBlobHeight,
   BlobRemoveMode Mode
)

Parameters

ImageID: GdPicture image identifier. Only 1 bit per pixel images with black and white palette are supported.
MinBlobWidth: Minimum Width of Blob considered for removal.
MinBlobHeight: Minimum Height of Blob considered for removal.
MaxBlobWidth: Maximum Width of Blob considered for removal.
MaxBlobHeight: Maximum Height of Blob considered for removal.
Mode: Can be any value, not used internally starting V11.

Return Value

A member of the GdPictureStatus enumeration.

Remarks

This method is used in the "Document Clean Up" C# Demo.

This method will remove blobs with black pixels being at least 60% of the bounding rectangle of the blob.

Example

Removing blobs from a tiff and saving as a png.

using (GdPictureImaging gdpictureImaging = new GdPictureImaging())
{
    int imageID = gdpictureImaging.CreateGdPictureImageFromFile("image.tif", false);
 
    int minBlobWidth = 50;
    int minBlobHeight = 50;
    int maxBlobWidth = 1000;
    int maxBlobHeight = 1000;
 
    gdpictureImaging.RemoveBlob(imageID, minBlobWidth, minBlobHeight, maxBlobWidth, maxBlobHeight, BlobRemoveMode.FavorQuality);
    gdpictureImaging.SaveAsPNG(imageID, "image.png");
    gdpictureImaging.ReleaseGdPictureImage(imageID);
}

Reference

GdPictureImaging Class
GdPictureImaging Members
Overload List