I worked as main programmer for this course related project in a group of four people. The subject is removing and forging PRNU (Photo Response Non Uniformity) to achieve better security and privacy. Find the source code here on http://sourceforge.net/projects/prnudecompare/. 

There are fingerprints for digital photos and scanned documents. This can lead to non-anonymity of the author and unnecessarily expose large number of private information to the public. We investigate the cause of PRNU and then remove and forge it by using Java.