Itseez/opencv — pull request #1159 by lluisgomez (2013-07-19 23:30:03+00:00)
Title: Class-specific Extremal Region Filter algorithm as proposed in :

Neumann L., Matas J.: Real-Time Scene Text Localization and Recognition, CVPR 2012.

High-level C++ interface and implementation of algorithm is in the objdetect module.
C++ example, a test image, and the default classifiers in xml files.