How to perform photo recovery after my Samsung photos are deleted?

Hello, friends, is there any hope to recover shift deleted phone photos back? Honestly, my Samsung Galaxy S android cell phone photo folders were shift deleted on my Windows 7 PC and found no photo recovery solutions right now? I did have searched the related phone photo recovery problems over the internet and found some photo recovery software was needed. But, I did have no much idea about such software? How about give me some recommendations? Thanks a lot!