Legacy ImageMagick Discussions Archive

Hi all,
I am trying to use Magick.Net to remove a clipping-mask (transparent background) and ably featuring/antialiasing for smoothing of the edges.
I have install ImageMagick locally and got the following command to do what I require:

(unix syntax)

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magick identify -quiet -format "%[8BIM:1999,2998:#1]" image.jpg |\
magick -quiet image.jpg \( - -alpha off -negate -morphology erode diamond:1 -blur 0x1 -level 50x100% \) \
-alpha off -compose copy_opacity -composite \
result.png

(windows syntax)

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magick identify -quiet -format "%[8BIM:1999,2998:#1]" image.jpg |^
magick -quiet image.jpg ( - -alpha off -negate -morphology erode diamond:1 -blur 0x1 -level 50x100% ) ^
-alpha off -compose copy_opacity -composite ^
result.png

The code I have made in C# is the flowing:

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            using (MagickImage image = new MagickImage(bytes))
            {
                using (MagickImage image2 = new MagickImage(bytes))
                {
                    image2.Alpha(AlphaOption.Off);
                    image2.Negate();
                    image2.Morphology(MorphologyMethod.Erode, Kernel.Diamond, 1);
                    image2.Blur();
                    image2.Level(50, 100);

                    image.Composite(image2, CompositeOperator.CopyAlpha);

                    image.Write(AppDomain.CurrentDomain.BaseDirectory + "\\Image.png");
                }
            }

But the problem is that the C# code leave a white boarder around the image, can anyone see what I am doing wrong?

Images for testing is available at the following post: viewtopic.php?f=22&t=34049

Thank you all in advance!

You are not using the correct overload for `Level`:

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image2.Level(50, 100);

Should be:

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image2.Level(new Percentage(50), new Percentage(100));

And it looks like you are not doing the -alpha off on the first image. And as a last comment I would suggest that you use the

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using (MagickImage image2 = image.Clone())

Instead of

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using (MagickImage image2 = new MagickImage(bytes))

Hi dlemstra,

Thank you for your feedback, but did not work.

This is my code now:

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            using (MagickImage image = new MagickImage(bytes))
            {
                using (MagickImage image2 = new MagickImage(image.Clone()))
                {
                    image2.Alpha(AlphaOption.Off);
                    image2.Negate();
                    image2.Morphology(MorphologyMethod.Erode, Kernel.Diamond, 1);
                    image2.Blur();
                    image2.Level(new Percentage(50), new Percentage(100));

                    image.Alpha(AlphaOption.Off);
                    image.Composite(image2, CompositeOperator.CopyAlpha);

                    image.Write(AppDomain.CurrentDomain.BaseDirectory + "\\Image.png");
                }
            }

It does not seem like I get the white boarder anymore, but the entire image is half transparent when using the percentage as level. https://drive.google.com/file/d/1iMH426 ... sp=sharing

Help is still needed

Legacy ImageMagick Discussions Archive

Removing clipping mask and apply featuring/antialiasing

Removing clipping mask and apply featuring/antialiasing

Re: Removing clipping mask and apply featuring/antialiasing

Re: Removing clipping mask and apply featuring/antialiasing