Is there a way to recover deleted pictures from Samsung Galaxy S4? I thought I was deleting one picture and instead deleted an entire album.
Unfortunately, no, not unless you had them backed up somewhere. If by chance they were on your SD card, you could try recovery software on it (it's been a while since I've used one, so have no recommendations).
Try this:
http://www.wondershare.com/disk-utility/android-photo-recovery.html
