1. A computer-implemented method comprising: receiving image data from one or more sensors of a moving platform; detecting one or more objects from the image data, the one or more objects potentially representing extremities of a user associated with the moving platform; processing the one or more objects using two or more context processors and context data retrieved from a context database, the processing producing at least two confidence values for each of the one or more objects; and filtering at least one of the one or more objects from consideration based on the confidence value of each of the one or more objects.