GdPicture.NET.14~GdPicture14.GdPictureImaging~ConvertTo8BppGrayScale - ConvertTo8BppGrayScale Method (GdPictureImaging) -

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

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

'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);

}

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); }

Reference

GdPictureImaging Class
GdPictureImaging Members
ConvertTo8BppGrayScaleAdv Method