This image is cropped from this image http://www.vickirichter.com/forums/index.php?act=Attach&type=post&id=5833 from the site http://www.vickirichter.com owned and operated by Vicki Richter. Ms. Richter wanted a different image on the wikipedia page about her. She approved the use of the image in an exchange on her site:

Question: Okay, I need to get consent that I can put this image into the public domain before I can put it on the page.

I really like this one. However, it's Vicki's page of course so:

Vicki, what image would you like to use? Remember that once we upload it it becomes public domain so it can be copied and used freely.

Vicki: Great