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How do I transfer the alpha channel from one image to another using a pipeline??
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Joined: 5/10/2017(UTC)
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Hello, I got two images source an alphaSource and I want to transfer the alphachannel of the alphasource to the source; So far I've gotten so far: Code:using (var alphaReader = ImageReader.Create(@"C:\Users\srombach\AppData\Local\Temp\KittelbergerAMPS3ImagePlugin.alpha.tmpA736.tif"))
using (var sourceReader = new ImageGenerator(alphaReader, RgbColor.Black))
using (var splitter = new ChannelSplitter())
using (var setAlpha = new SetAlpha())
using (var writer = new TiffWriter(Path.GetTempPath() + "alphainjected3.tif"))
{
alphaReader.Receivers.Add(rgbSplitter);
setAlpha.AlphaSource = splitter[Channel.Alpha];
(sourceReader + setAlpha + writer).Run();
}
but it throws an error "No source element in pipemap." which is understandable because the setAlpha.AlphaSource-Pipeline is not executed. I tried various combinations of (https://github.com/aurigma/GraphicsMill.Samples) ChannelsExample.cs, BrightnessContrastExample.cs, MultipleSourcesExample.cs, but came up with no solution. Please set me on the right track. Edited by user Thursday, May 18, 2017 12:58:38 AM(UTC)
| Reason: removed RgbChannelSplitter for ChannelSplitter
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Rank: Advanced Member
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Currently, I see no way to implement it using a single pipeline and without using a temporary file: Code:using (var alphaSourceReader = ImageReader.Create("../../../in.png"))
{
using (var splitter = new RgbChannelSplitter())
using (var alphaWriter = ImageWriter.Create("../../../alpha_temp.tif"))
{
alphaSourceReader.Receivers.Add(splitter);
splitter.A = alphaWriter;
Pipeline.Run(alphaSourceReader);
}
using (var alphaReader = ImageReader.Create("../../../alpha_temp.tif"))
using (var sourceReader = new ImageGenerator(alphaSourceReader, RgbColor.Blue))
using (var setAlpha = new SetAlpha())
using (var sourceWriter = ImageWriter.Create("../../../out.tif"))
{
setAlpha.AlphaSource = alphaReader;
(sourceReader + setAlpha + sourceWriter).Run();
}
}
Even though, we will implement it in the further versions of Graphics Mill (Aurigma Bug #0023326). |
Best regards,
Fedor Skvortsov
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Rank: Advanced Member
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Joined: 9/19/2006(UTC)
Posts: 505
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Hi, Sebastian. You can try to use ChannelCombiner: Code:
using (var sourceReader = ImageReader.Create("source.jpg"))
using (var splitter = new RgbChannelSplitter())
using (var alphaReader = ImageReader.Create("AlphaSource.png"))
using (var alphaSplitter = new RgbChannelSplitter())
using (var writer = ImageWriter.Create("result.png"))
using (var channelCombiner = new RgbChannelCombiner())
{
sourceReader.Receivers.Add(splitter);
alphaReader.Receivers.Add(alphaSplitter);
channelCombiner.R = splitter.R;
channelCombiner.G = splitter.G;
channelCombiner.B = splitter.B;
channelCombiner.A = alphaSplitter.A;
channelCombiner.Receivers.Add(writer);
channelCombiner.RunPipeline();
}
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Best regards,
Eugene Kosmin
The Aurigma Development Team
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How do I transfer the alpha channel from one image to another using a pipeline??
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