KeepBlueComponent Method (GdPictureImaging)

In This Topic

Keeps only the blue color component of a GdPicture image or of an area of a GdPicture image defined by SetROI() method.

Syntax

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

'Declaration
 
Public Function KeepBlueComponent( _
   ByVal ImageID As Integer _
) As GdPictureStatus

public GdPictureStatus KeepBlueComponent( 
   int ImageID
)

public function KeepBlueComponent( 
    ImageID: Integer
): GdPictureStatus;

public function KeepBlueComponent( 
   ImageID : int
) : GdPictureStatus;

public: GdPictureStatus KeepBlueComponent( 
   int ImageID
)

public:
GdPictureStatus KeepBlueComponent( 
   int ImageID
)

Parameters

ImageID: GdPicture image identifier.

Return Value

A member of the GdPictureStatus enumeration.

Remarks

This method is used in the "Image Processing" Demo.

Example

Filtering a jpeg image so only the blue component is kept.

using (GdPictureImaging gdpictureImaging = new GdPictureImaging())
{
    int imageID = gdpictureImaging.CreateGdPictureImageFromFile("image.jpg", false);
 
    // Keep only the blue color component.
    gdpictureImaging.KeepBlueComponent(imageID);
    gdpictureImaging.SaveAsJPEG(imageID, "image.jpg", 75);
    gdpictureImaging.ReleaseGdPictureImage(imageID);
}

Reference

GdPictureImaging Class
GdPictureImaging Members
SetROI Method
ResetROI Method