Labeling problem statement Head □□□□ Neck C Torso 4 CC ∈ C-thead, neck, torso, leg, tail, ear cc>可视计算研究中心 Visual Computing Research CenterLabeling problem statement C = { head, neck, torso, leg, tail, ear } c1 Head Neck Torso Leg Tail Ear c2 c4 c3 1 2 3 c c c C , ,  10