If they are truly in your PC's recycle bin, they are easily recovered. Open the recycle bin and highlight the ones you want and click 'restore this item' or 'restore all items'.
If the recycle bin has been emptied, then you'd need a utility to recover them. I don't know the names of any off hand, but I know there are some.
Here is one such program from a reputable company. http://www.pctools.com/file-recover/