This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
It also has no relevance to SCWCD certification, so I'm moving this to "Other Java APIs". The Java Foundation Classes (JFC) has some support for image manipulation, see docs/guide/2d/index.html in your JDK directory. You may also be interested in the Java Media APIs, especially Advanced Imaging and Image I/O. - Peter
Yeah Java Advanced Imaging is the way to go I think. There is a good book about it called "Building Imaging Applications with Java Technology". I am starting to work on an ROI(region of interest) application and am reading the book now.