File APIs for Java Developers
Manipulate DOC, XLS, PPT, PDF and many others from your application.
The moose likes Beginning Java and the fly likes Checksum for Image comparison Big Moose Saloon
  Search | Java FAQ | Recent Topics | Flagged Topics | Hot Topics | Zero Replies
Register / Login
JavaRanch » Java Forums » Java » Beginning Java
Bookmark "Checksum for Image comparison" Watch "Checksum for Image comparison" New topic

Checksum for Image comparison

Gupta Nitin

Joined: Feb 05, 2007
Posts: 7
what is the checksum method of image comparison and how do i do it in Java?
Ulf Dittmer

Joined: Mar 22, 2005
Posts: 42965
I'm not quite sure what you're getting at, but generating a checksum of a file (image or otherwise) would involve calculating the sum of all bytes in that file. If you do that for two files, chances are good that the files will be identical if the checksums are identical. Wikipedia has more to say on the subject.
I agree. Here's the link:
subject: Checksum for Image comparison
It's not a secret anymore!