Photoshop CS5's powerful lens correction tool

as shot:


corrected:



(note that vertical lines are not perfectly vertical coz i shot it
handheld and not perfectly aligned with hor/ver axis. only barrel
distortion or slight curve on straight lines (inherent from the lens) was corrected. the sliding door isn't perfectly straight in actual though (the frame is).

here's a preview of the parameters in PS:

if your camera/lens model cannot be found locally, hit 'search online' then viola--the cam/lens combination.

thanks very informative