January 2018
Intermediate to advanced
486 pages
11h 28m
English
As it was mentioned before, Extra modules are mostly wrappers for third-party libraries, that means they only contain interfaces or methods needed to integrate those modules. An example Extra module would be the text module. This module contains interfaces to use Text Detection in images or OCR (Optical Character Recognition), and you'll also need those third-party modules for this work, and they are not covered as a part of this book, but you can always check the OpenCV documentation for an updated list of Extra modules and how they are used.
For more information on this you can refer to http://docs.opencv.org/master/index.html.