How to recover data from lost+found

Hi All,
I am facing a problem of filesystem corruption,where i am trying to recover data with fsck -f <device name> ,now it restore the corrupted data in lost+found directory.Please let me know how to recover the data from lost+found directory.

Thanks,
Shailesh

There is no way of automatically rebuilding a file using lost+found.

If you know what you are doing you can rebuild a file using dd and similar utilities but you have to have intimate knowledge of the original file layout and contents including offsets of the orphaned sectors, etc.