adjustContrast(ImGearRasterPage,double,double,double) Method

Gamma value.

If the image is indexed and not grayscale, it modifies the image's palette, otherwise it modifies the image's pixels. Processes only color channels. Contrast mode is ImGearContrastModes.AUTO.

Average parameter range:

Contrast: -2 ... +2 (negative means contrast inversion. In case of 1 no changes)
Brightness: -128...+128
Gamma: 0...10

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

Method ImGearRasterProcessing.Verifier.CanApplyAdjustContrast (ImGearPage page) can be called to check whether the operation can be performed.

com.accusoft.imagegear.core.ImGearRasterPage

Adjusts contrast, brightness, and gamma.

Syntax

public static void adjustContrast( 
   ImGearRasterPage page,
   double contrast,
   double brightness,
   double gamma
)

Parameters

page

Image to adjust contrast.

contrast

Contrast value.

brightness

Brightness value.

gamma