Image with 2 different color profiles

[alejandroLoz]

So I have a "background" image that has an attached color profile:

color profile exif data:

And another "clipart" image with a default sRGB color profile:

When I combine them using the following code:

MagickImage background = new MagickImage("C:\\Users\\someUser\\Documents\\background.jpg");
MagickImage clipart = new MagickImage("C:\\Users\\someUser\\Documents\\clipart\\clipart.png");
clipart.Resize(1000,1000);
background.Composite(clipart);
background.Write("C:\\Users\\loski\\Documents\\ticket\\generated.jpg");

The clipart image ends up with what it looks like the inverted colors:

What am I doing wrong? How can I fix it?

[dlemstra]

I don't have time to check this properly now but it looks like you are mixing CMYK and sRGB images.

[alejandroLoz]

Thank you so much @dlemstra! This will sound silly but I feel honored to receive your message. 😊
What you'd recommend/ what's the best practice to mix a CMYK with an sRGB image?

[dlemstra]

It all depends on what kind of output image you want to have. I suspect that you want to have an CMYK output image looking at your website. You should then change your sRGB image to CMYK with the TransformColorSpace method. You can find an example for that in documentation.

p.s. There is no need to feel honored as I am one of the few people that can answer your question 😃.

[alejandroLoz]

That worked!
I'm attaching a snippet to use as a reference in case someone faces the same problem:

    IColorProfile sourceProfile = ColorProfile.SRGB;
    IColorProfile targetProfile = ColorProfile.USWebCoatedSWOP;
    if (baseImage.GetColorProfile() != null)
    {
        targetProfile = baseImage.GetColorProfile();
    }
    if (clipart.GetColorProfile() != null)
    {
        sourceProfile = clipart.GetColorProfile();
    }
    clipart.TransformColorSpace(sourceProfile, targetProfile);

[dlemstra]

Thanks for adding the snippet. And you don't need to check if the sourceProfile exists because method will only use it when the image has no color profile. But I just noticed that the check was not 100% correct so I pushed a patch to fix that in the next release. For now you can use clipart.HasProfile("icc") || clipart.HasProfile("icm") but after the next release you can remove that. And I would also advise you to only call baseImage.GetColorProfile() once because you would otherwise create an object twice.