So I did.
Blank pendants make things very easy. All you have to do is measure the blank space, and print out a picture to fit. Mine ended up being 0.7x1.7 inches. Then, I pulled out the trusty desktop laminator, which added a glossy sheen to the image, and will also protect it from fading. Then I used permanent double-sided tape to stick the picture in. I decided against using glue or epoxy because I figure if the picture gets ruined, I can peel it off the pendant and put in a new one.
Lastly, I swiped a chain from one of my other necklaces, and voila!