Demonstration of several computer vision techniques provided by BoofCV. BoofCV is an open source computer vision library written in pure Java. This application demonstrates the following: 1) image processing (blur, edge, binary), 2) detection (corner, blob, line), 3) image association, 4) structure from motion (calibration, stereo disparity, mosaic/stabilization), 4) object tracking, 5) Fiducials, and 6) motion detection

Project Website: http://boofcv.org

For instructions and a more detailed explanation:
http://peterabeles.com/blog/?p=204

Full source code:
https://github.com/lessthanoptimal/BoofAndroidDemo