STADO can be decomposed into one module and three branches:
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Produces a spatial attention mask to modulate features generated by the backbone to focus on non-occlusion patterns.
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(2.1) Center Branch for center localization and action recognition.
(2.2) Movement Branch for movement estimation at adjacent frames to form moving point trajectories.
(2.3) Box Branch for spatial extent detection by directly regressing bounding box size at the estimated center point of each frame.