new BitmapImage(new Uri("pack://application:,,,/**your assembly name**;component//Helper/Image/Image.png", UriKind.RelativeOrAbsolute));
Application.GetResourceStream(new Uri("/**your assembly name**;component/Helper/Image/Image2.png", UriKind.RelativeOrAbsolute))
https://docs.microsoft.com/en-us/dotnet/desktop/wpf/app-development/pack-uris-in-wpf?view=netframeworkdesktop-4.8