2.1 Influence of different contextual scales S_c and Mean Shift scales S_m 33

2.2 Quantitative comparisons to contextual global features in Caltech5 subset 37

2.3 Quantitative comparisons to Shape Context in Caltech5 subset (classification phase: SVM) 38

2.4 Time cost comparisons of different contextual scales (S_c) and mean shift scales (S_m) 38

3.1 Hierarchical quantization errors measured using the overlapping rates (%) 42

3.2 Performance analysis of VT Shift 63

5.1 Time (Second) requirements for CBoP and other alternatives on the mobile end 97