All the program examples in this book are based on OpenCV version 2.0. The code should definitely work under Linux or Windows and probably under OS-X, too. Source code for the examples in the book can be fetched from this book's website (http://www.oreilly.com/catalog/9780596516130). OpenCV can be loaded from its source forge site (http://sourceforge.net/projects/opencvlibrary).
OpenCV is under ongoing development, with official releases occurring once or twice a year. As a rule of thumb, you should obtain your code updates from the source forge CVS server (http://sourceforge.net/cvs/?group_id=22870).
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