GdPicture image identifier.
Example





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GdPicture14 Namespace / GdPictureImaging Class / ConvertTo8BppGrayScale Method

ConvertTo8BppGrayScale Method (GdPictureImaging)

In This Topic
Converts a GdPicture image to an 8-bit gray-scaled indexed color image. The color table has 256 entries.
Syntax
'Declaration

 


Public Function ConvertTo8BppGrayScale( _

   ByVal ImageID As Integer _

) As GdPictureStatus
public GdPictureStatus ConvertTo8BppGrayScale( 

   int ImageID

)
public function ConvertTo8BppGrayScale( 

    ImageID: Integer

): GdPictureStatus; 
public function ConvertTo8BppGrayScale( 

   ImageID : int

) : GdPictureStatus;
public: GdPictureStatus ConvertTo8BppGrayScale( 

   int ImageID

) 
public:

GdPictureStatus ConvertTo8BppGrayScale( 

   int ImageID

)

Parameters

ImageID
GdPicture image identifier.

Return Value

A member of the GdPictureStatus enumeration.
Remarks
This method uses a basic grayscale color reduction algorithm, where all three color channels rgb have the weight.
Example
Converts selected image to an 8-bit gray-scaled 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.ConvertTo8BppGrayScale(imageID);

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

 

    // Release used resources.

    gdpictureImaging.ReleaseGdPictureImage(imageID);

}
See Also

Reference

GdPictureImaging Class
GdPictureImaging Members
ConvertTo8BppGrayScaleAdv Method