Magick.NET and creating a hidden text watermark

[cblaze22]

Any help on this question would be great.

https://stackoverflow.com/questions/77875340/magick-net-and-creating-a-hidden-text-watermark

Maintainer edit (added post content from stack overflow):

Is there a way to create a hidden watermark text so we can verify if our images were copied on another site in the future? We are currently playing around with this code below but it just writes the text all over the image, instead of it being hidden and not seen. Is there anything other then a watermark I can do to handle this situation with Magick.NET?

The below code doesn't seem to be getting 0 back on new file.

 using (var message = new MagickImage("label:© Events", 200, 20))
 {
     using (var image = new MagickImage(imagePath))
     {
         image.Stegano(message);
         image.Write(imageSteganoPath);

         var settings = new MagickReadSettings();
         settings.Format = MagickFormat.Stegano;
         settings.Width = 200;
         settings.Height = 20;

         using (var hiddenMessage = new MagickImage(imageSteganoPath, settings))
         {
             Assert.AreEqual(0, message.Compare(hiddenMessage, ErrorMetric.RootMeanSquared));
         }
     }
 }

[dlemstra]

I don't understand what you are trying to do.

[cblaze22]

I’m trying to write a hidden message into the image to verify if someone is using it. Using Stegano the reversing of the label doesn’t show 0 to verify the label. Not sure I’m doing it right but this code was taken from a past Magick example.

[dlemstra]

Your stack overflow post says this:

We are currently playing around with this code below but it just writes the text all over the image, instead of it being hidden and not seen.

I don't see the text when I use the Stegano method?

Using Stegano the reversing of the label doesn’t show 0 to verify the label.

The value will be close to zero? It might be a tiny bit higher than zero.

[cblaze22]

It’s like 2.4 or something. I’ll test it without and see how large it is with out it. I figured it would have been 0 though thanks. Sorry some of that was old comments, with all over the image. Mike

…

On Sun, Jan 28, 2024 at 12:48 PM Dirk Lemstra ***@***.***> wrote: Your stack overflow post says this: We are currently playing around with this code below but it just writes the text all over the image, instead of it being hidden and not seen. I don't see the text when I use the Stegano method? Using Stegano the reversing of the label doesn’t show 0 to verify the label. The value will be close to zero? It might be a tiny bit higher than zero. — Reply to this email directly, view it on GitHub <#1527 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAEH3TSKL7FRF2KT7IQEXE3YQ2FOPAVCNFSM6AAAAABCJGLEWSVHI2DSMVQWIX3LMV43SRDJONRXK43TNFXW4Q3PNVWWK3TUHM4DENZTGQ2DQ> . You are receiving this because you authored the thread.Message ID: ***@***.***>