This guide describes how to install and configure OpenCV 2.4.2 and its dependencies on Ubuntu 12.04. This guide includes instructions for both 32-bit and 64-bit systems. Revision History: [2012-09-12] Updated guide to work with OpenCV 2.4.2. Updated ffmpeg section: ffmpeg 0.11.1 now requires -pic option on 64-bit systems. [2012-06-05] Updated guide to work with OpenCV 2.4.1 and Ubuntu 12.04. Added