Silhouette Project - Ornaments

I have been contemplating how to do this, whether in a framed format or this ornament style. Found this at an on-line crafty party at Just a Girl(she's over in my favorite's list). This example seems to provide the detail I've been missing-- how to get the actual picture into profile format, to create the silhouette. Can't wait to give these a try. Thanks Roots and Wings for this idea.