See Also: CIGammaAdjust Members
The following example shows this filter in use
C# Example
// Create a CIImage from a file CIImage flower = CIImage.FromCGImage (UIImage.FromFile ("flower.png").CGImage); // Create the GammaAdjust filter var gammaAdjust = new CIGammaAdjust () { Image = flower, Power = 3F, // Default value: 0.75 }; // Get the Gamma Adjusted image var output = gammaAdjust.OutputImage; // To render the results, we need to create a context, and then // use one of the context rendering APIs, in this case, we render the // result into a CoreGraphics image, which is merely a useful representation // var context = CIContext.FromOptions (null); var cgimage = context.CreateCGImage (output, output.Extent); // The above cgimage can be added to a screen view, for example, this // would add it to a UIImageView on the screen: myImageView.Image = UIImage.FromImage (cgimage);
With the following source:
Produces the following output:
"Flower" © 2012 Milica Sekulic, used under a Creative Commons Attribution-ShareAlike license: http://creativecommons.org/licenses/by-sa/3.0/ "Sunrise near Atkeison Plateau" © 2012 Charles Atkeison, used under a Creative Commons Attribution-ShareAlike license: http://creativecommons.org/licenses/by-sa/3.0/ "canon" © 2012 cuatrok77 hernandez, used under a Creative Commons Attribution-ShareAlike license: http://creativecommons.org/licenses/by-sa/3.0/