GdPicture image identifier.
Contrast adjustment between -100 and 100.
Example





In This Topic

SetContrast Method (GdPictureImaging)

In This Topic
Adjust the Contrast in a GdPicture image or in the area defined by SetROI() method.
Syntax
'Declaration

 


Public Function SetContrast( _

   ByVal ImageID As Integer, _

   ByVal Contrast As Integer _

) As GdPictureStatus
public GdPictureStatus SetContrast( 

   int ImageID,

   int Contrast

)
public function SetContrast( 

    ImageID: Integer;

    Contrast: Integer

): GdPictureStatus; 
public function SetContrast( 

   ImageID : int,

   Contrast : int

) : GdPictureStatus;
public: GdPictureStatus SetContrast( 

   int ImageID,

   int Contrast

) 
public:

GdPictureStatus SetContrast( 

   int ImageID,

   int Contrast

)

Parameters

ImageID
GdPicture image identifier.
Contrast
Contrast adjustment between -100 and 100.

Return Value

A member of the GdPictureStatus enumeration.
Remarks
This method is used in the "Image Processing" Demo.
Example
Change image contrast using random value and saves result into a PNG file. 
using (GdPictureImaging gdpictureImaging = new GdPictureImaging())

{

    int imageID = gdpictureImaging.CreateGdPictureImageFromFile("input.png");

 

    // Change image contrast using random value. Allowed values are from -100 to +100.

    Random random = new Random();

    int contrast = random.Next(-100, 100);

    gdpictureImaging.SetContrast(imageID, contrast);

 

    gdpictureImaging.SaveAsPNG(imageID, "output.png");

    gdpictureImaging.ReleaseGdPictureImage(imageID);

}
See Also

Reference

GdPictureImaging Class
GdPictureImaging Members
SetROI Method
ResetROI Method
SetBCSG Method