OpenCV + Ubuntu

May 2, 2012 - 3 mins read

Building OpenCV 2.3.1 from source on Ubuntu 12.04 x64. Here is an overview of the compilation of OpenCV with x264 and ffmpeg builtin. If you have completed my Kinect + OpenNI + PrimeSensetutorial, this will also support the OpenNI and PrimeSense drivers with OpenCV. This is largely based on the wonderful OpenCV tutorials from Sebastian Montabone and Osman Eralp. Before you start, make sure to have removed ffmpeg and x264 (if applicable):

Google Earth + Mult-axis Controller

May 2, 2012 - 2 mins read

Six degree of freedom control for Google Earth using the 3Dconnexion SpaceNavigator on Ubuntu Linux. Based on directions from here: http://code.google.com/p/liquid-galaxy/wiki/LinuxSpaceNavigator First, install the necessary package dependencies: sudo apt-get install xinput xserver-xorg-input-joystick Next we add a udev rule to automatically recognize the Space Navigator based on its vendor/product ids and create a symlink at /dev/input/spacenavigator. Create the following file as root: sudo gedit /etc/udev/rules.d/90-spacenavigator.rules and add the following line:

Android + BackTrack Chroot

May 2, 2012 - 3 mins read

The following tutorial will demonstrate how to run Backtrack Linux in an Android chroot environment. It should work on most Android devices that support at least ARMv7 architecture or newer. Download BackTrack ARM edition http://www.backtrack-linux.org/downloads/ You can download via torrent or direct, the rest of the settings should look like this: Image Name: BT5-GNOME-ARM [.torrent | .7z] Size (MB): 1060 Desktop: GNOME Architecture: arm Image: IMG Download: [Direct | Torrent] MD5sum: a66bf35409f4458ee7f35a77891951eb Extract the contents using 7zip (apt-get install p7zip if you don’t have it installed)

Android + Linux Chroot + Common Problems

May 2, 2012 - 2 mins read

Corrupted Filesystem **Problem: **ext2 Distribution Image **Explanation: **If you formated the distribution partition as ext2 then chances are you will have a filesystem corruption. The trouble is fsck doesn’t come with busybox and it’s hard to run fsck on your root filesytem while mounted. The solution is to mount the distribution image from another linux machine and run fsck. Solution: Disable USB debugging on your phone. Plug your phone into a linux box.

Android + Linux Chroot + Node.js

May 2, 2012 - 2 mins read

This article will walk you through how to compile, from source, node.js on Android. After installing node.js on about 4 different devices (Thunderbolt, Incredible, two G1’s, Galaxy S) I decided to compile this tutorial. Prerequisites Android running Debian in a chroot(ed) environment. Environment contains the necessary path(s) vim /etc/bashrc PATH=$PATH:/usr/local/bin Swap File (G1 only?) The RAM in both the Incredible and Thunderbolt are sufficient to compile node.js. The G1 however, requires a swap file to supplement the small amount of RAM to successfully compile node.