Just print off any picture you want, then spray paint a piece of wood black, cut the picture to match the size of the wood. Using Mod podge coat the wood then lay the picture on top. Once it dries, put a layer of mod podge over the top of the picture.
DIY canvas photo tutorial - make sure to use an ink jet or laser printer with regular paper (not photo paper). Can also use mod podge instead of gel medium and olive oil instead of furniture polish. Finish with another layer of mod podge to seal.