Installation instructions on opendetection homepage is a bit lacking.

OpenNI is an optional dependency in PCL and OpenCV but opendetection doesn't build without it as it requires BUILD_apps_3d_rec_framework=ON. It should be listed as an additional dependency.

Also, in my case I had to use BUILD_TESTS=ON in VTK 6.3 which is not listed in installation instructions.

Lastly, I am not sure about this one but it also requires VTK and OpenCV to be build with QT.