

![0_image_0.png](0_image_0.png) ![0_image_1.png](0_image_1.png)

profile to *pick up* and *put down* events. LEONARD correctly recognizes that these movies do not match any known event types.

An approach to even classification is valid and useful only if it is robust. A preliminary evaluation of the robustness of LEONARD was conducted. Thirty five movies were filmed, five instances of each of the seven event types pick up, put down, stack, unstack, move, *assemble*, and *disassemble*. These movies resemble those in Figures 1 and 11 through 15. The same subject performed all thirty