from what i understand this method will hide one image inside another image? Thats great but how can i run an image through a function and verify if it contains the hidden watermark? Is there any way to modify an image by hiding some sort of data or identification message in it that I would be able to check regardless of cropping and other modifications an individual may do to it? Below is the code i use to insert the stegano, which seems to work fine. The image prints out and looks unchanged by the addition of the hidden watermark which i expected but i have no way now of verifying that it is in there. Thanks for the help. 
    my $background=Image::Magick->new(magick=>"gif");
    $background->BlobToImage($binary_data);

    my $foreground=Image::Magick->new;
    $foreground->Read($watermark_file);
    
    $background->Stegano(image=>$foreground, offset=> 1);
    
    $background->Write("gif-");
    
    $binary_data = $background->ImageToBlob();

    print "content-type: image/gif\n\n";
    print $binary_data;

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In reply to Image::Magick stegano question by bear0053

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