The example code is not working

Created by: siebenkopf

Currently, the example script in bob/ip/optflow/hornschnuck/example/optflow_hs.py is not exported to the bin/ directory, and the code is not tested. In fact, it will not work as it is.

To make this example work, the package needs to depend on bob.io.base and bob.io.video, and the code needs to be corrected. For the tests to work, a dependency to bob.io.image is additionally required.