image registration & comparison

Dear all,
I'm new in image analysis, so I apologize for my
(maybe) stupid questions.
I'm facing this project:

1) acquire an image from a scanner (TWAIN)
2) register it (rotate & shift)
3) match it against a "master" considered to be "good"
  (pixel by pixel difference of the two images,
   then gradient of the result to detect big
differences)
   
The goal is automatic recognition of defects on a
printed film.
Before going on, I'd like to hear some experienced
user's opinion:
- is OpenCV the right choice for jobs 2 & 3?
- are OpenCV edge detection routines precise enough to
grant
  perfect alignment between the scanned image and the
master?
- am I on the right way? I don't feel confident
expecially about point 3.
  read: how would you solve this problem if you were
in my shoes?
- could someone point me out on some literature about
images comparison?
Thank you for your answers,
Lorenzo



        

        
                
___________________________________ 
Yahoo! Mail: gratis 1GB per i messaggi e allegati da 10MB 
http://mail.yahoo.it




Change settings: http://www.yahoogroups.com/mygroups, select
   Get Emails (get all posts)
   Daily Digest (one summary email per day)
   Read on the web (read posts on the web only)Or Unsubscribe by mailing 
OpenCV-unsubscribe@xxxxxxxxxxxxxxx