InteractiveMeasure
calculate_errors()
distort()
load_intrinsic()
load_matrix()
load_matrix_as_point()
load_model_points()
multiply_points_by_matrix()
picked_object_directory_reader()
picked_object_reader()
plot_errors()
plot_errors_interactive()
project()
check_tracker_data()
compute_tracked_pointer_posn()
extract_pointer_offset()
register_point_sets()