How to remove the shaded area of a image

[tonyfkchu]

Dear Expert,

How can I remove the shaded area of the following image with IM.net?

[dlemstra]

Can you help us with this @fmw42? I can translate it to C#.

[fmw42]

Here are 3 possibilities: convert img.png -colorspace gray -negate -lat 10x10+5% -negate x.png convert img.png -colorspace gray -negate -lat 20x20+5% -negate x2.png convert img.png \( +clone -blur 0x5 \) +swap -compose divide -composite -contrast-stretch 3x0% x3.png Sorry, I had no luck with the dotted lines issue. Fred

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On Oct 12, 2020, at 6:49 AM, Dirk Lemstra ***@***.***> wrote: Can you help us with this @fmw42 <https://github.com/fmw42>? I can translate it to C#. — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#757 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ADGVWKTVZ4XF5DXZ6SMYK73SKMCOTANCNFSM4SM2B3TA>.

[tonyfkchu]

How can convert this to .with .Net APi ?

convert img.png ( +clone -blur 0x5 ) +swap -compose divide -composite -contrast-stretch 3x0% x3.png

[dlemstra]

That command would translate to this:

using (var image = new MagickImage("img.png"))
{
    using (var clone = image.Clone())
    {
        clone.Blur(0, 5);
        clone.Composite(image, CompositeOperator.DivideDst);
        clone.ContrastStretch(new Percentage(3), new Percentage(0));
        clone.Write("x3.png");
    }
}