FxGrayscale Method (GdPictureImaging)

In This Topic

Performs grayscale effect on a GdPicture image or on 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 FxGrayscale( _
   ByVal ImageID As Integer _
) As GdPictureStatus

public GdPictureStatus FxGrayscale( 
   int ImageID
)

public function FxGrayscale( 
    ImageID: Integer
): GdPictureStatus;

public function FxGrayscale( 
   ImageID : int
) : GdPictureStatus;

public: GdPictureStatus FxGrayscale( 
   int ImageID
)

public:
GdPictureStatus FxGrayscale( 
   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

Performing a grayscale effect on a GdPicture image.

using (GdPictureImaging gdpictureImaging = new GdPictureImaging())
{
    // LoadInMemory parameter is set to true in order to be able to update the input file.
    int imageID = gdpictureImaging.CreateGdPictureImageFromFile("image.jpg", true);
 
    // Convert an image to grayscale.
    gdpictureImaging.FxGrayscale(imageID);
    gdpictureImaging.SaveAsJPEG(imageID, "image.jpg");
    gdpictureImaging.ReleaseGdPictureImage(imageID);
}

Reference

GdPictureImaging Class
GdPictureImaging Members
SetROI Method
ResetROI Method