'Declaration
 
Public Overloads Shared Sub AdjustContrast( _
   ByVal page As ImGearRasterPage, _
   ByVal contrast As Double, _
   ByVal brightness As Double, _
   ByVal gamma As Double, _
   ByVal mode As ImGearContrastModes, _
   ByVal channels As ImGearChannelRange _
) 

'Usage
 
Dim page As ImGearRasterPage
Dim contrast As Double
Dim brightness As Double
Dim gamma As Double
Dim mode As ImGearContrastModes
Dim channels As ImGearChannelRange
 
ImGearRasterProcessing.AdjustContrast(page, contrast, brightness, gamma, mode, channels)

public static void AdjustContrast( 
   ImGearRasterPage page,
   double contrast,
   double brightness,
   double gamma,
   ImGearContrastModes mode,
   ImGearChannelRange channels
)

public: static void AdjustContrast( 
   ImGearRasterPage* page,
   double contrast,
   double brightness,
   double gamma,
   ImGearContrastModes mode,
   ImGearChannelRange channels
) 

public:
static void AdjustContrast( 
   ImGearRasterPage^ page,
   double contrast,
   double brightness,
   double gamma,
   ImGearContrastModes mode,
   ImGearChannelRange channels
) 

Parameters

page

Image to adjust contrast.

contrast

Contrast value.

brightness

Brightness value.

gamma

Gamma value.

mode

One of the following values: ImGearContrastModes.PALETTE - image palette is adjusted. If the image does not have a palette then an exception will be generated ImGearContrastModes.PIXEL - image pixels are adjusted ImGearContrastModes.AUTO - adjust mode depends on the image color space.

channels

Structure that defines the channel range to process.

Can be applied only to the raster pages with standard (non Run-Ends) DIB.

If ContrastMode is equal to ImGearContrastModes.PALETTE, DIB must have a palette.

Use ImGearRasterProcessingVerifier.CanApplyAdjustContrast method to check whether the operation can be performed.

Reference