adds class for the calculation of the lukas kanade optical flow

Signed-off-by: Marcel Schwittlick <marzzzel@gmail.com>
- includes the LukasKanadeOpticalFlow into the main application
- adds namedWindows for displaying the flow

Signed-off-by: Marcel Schwittlick <marzzzel@gmail.com>
now uses pointers to apply the background subtraction

Signed-off-by: Marcel Schwittlick <marzzzel@gmail.com>
getNextImage now returns a pointer to an image

Signed-off-by: Marcel Schwittlick <marzzzel@gmail.com>
adds static functions to draw the optical flow motion fields.
they still need heavy refactoring

Signed-off-by: Marcel Schwittlick <marzzzel@gmail.com>
class to easyily access system properties. for now only returning the nr of available cuda devices.

Signed-off-by: Marcel Schwittlick <marzzzel@gmail.com>