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