Between lines 83 and 88. You're flipping the view and not flipping it back because you have the code commented out.
Edited to add
I see you are using the sample project from http://maniacdev.com/2011/11/tutorial-easy-face-detection-with-core-image-in-ios-5/
You're flipping the image view, but you aren't flipping the window to account for this flip.
Edited to add again
Okay - looking a bit more at the tutorial and sample code that you are using, it's the flipping of the window that you don't want. But you'll need to write your code differently.
A better example is provided at http://www.bobmccune.com/2012/03/22/ios-5-face-detection-with-core-image/ which has the image displayed using drawInRect:
and the context translated for drawing the facial features.