Rank: Newbie
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Joined: 2/16/2018(UTC)
Posts: 2
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I am trying to process only single channels of my image. How would you go about that? Let's say I want to increase the brightness of only the red channel. Can I do that directly or do I have to split and then combine?
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Rank: Advanced Member
Groups: Guest
Joined: 9/19/2006(UTC)
Posts: 505
Was thanked: 41 time(s) in 41 post(s)
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Hi, Unfortunately, there are no planar pixel formats in GraphicsMill. So, the only way is to split and combine the image. This is a sample with Bitmaps: Code:using (var bitmap = new Bitmap("MyImage.JPG"))
using (var brightness = new Brightness(0.1f))
using (var red = bitmap.Channels[Channel.Red])
{
red.ApplyTransform(brightness);
bitmap.Channels[Channel.Red] = red;
bitmap.Save("output.jpg");
}
And this is with Pipeline API: Code:using (var reader = ImageReader.Create("MyImage.jpg"))
using (var splitter = new RgbChannelSplitter())
using (var combiner = new RgbChannelCombiner())
using (var writer = ImageWriter.Create("output.jpg"))
using (var brightness = new Brightness(0.1f))
{
reader.Receivers.Add(splitter);
combiner.R = splitter.R + brightness;
combiner.G = splitter.G;
combiner.B = splitter.B;
Pipeline.Run(combiner + writer);
}
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Best regards, Eugene Kosmin The Aurigma Development Team |
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