states.kalman.bbox

Two models ship in-tree: - ``"sort"`` (default, 7-D state): ``[x, y, a, h, vx, vy, va]``. Aspect ratio ``a`` carries a velocity ``va``; height ``h`` is observed but has no velocity (matches the original SORT formulation, where height changes are absorbed by the measurement-update step rather than predicted). - ``"deepsort"`` (8-D state): ``[x, y, a, h, vx, vy, va, vh]``. Adds a height-velocity ``vh`` to match the DeepSORT / canonical-Kalman-bbox convention used by most modern tracking-by-detection pipelines. Both models observe the same 4-D measurement ``[x, y, a, h]``.