Research Article
Detecting Suspects by Large-Scale Trajectory Patterns in the City
Table 2
Movement perspective of different groups of people.
| Features | Morning (6∼9 a.m.) | Afternoon (16∼19 p.m.) | Midnight (1∼5 a.m.) | Normal | Suspect | Normal | Suspect | Normal | Suspect |
| Activity scope | 4.33 | 3.86 | 4.35 | 3.76 | 3.76 | 3.70 | Trajectory length | 24.90 | 7.58 | 24.43 | 6.87 | 44.59 | 6.46 | Trajectory curve | 23.49 | 6.65 | 19.03 | 6.67 | 37.28 | 5.22 | Speed | 13.67 | 16.41 | 13.28 | 16.50 | 13.36 | 20.41 | Velocity change rate | 0.22 | 0.20 | 0.18 | 0.22 | 0.15 | 0.19 | Movement pattern | 0.16 | 0.05 | 0.16 | 0.04 | 0.05 | 0.03 | Trajectory duration | 2.01 | 0.54 | 1.93 | 0.50 | 3.32 | 0.39 | Head change rate | 0.44 | 0.44 | 0.43 | 0.51 | 0.38 | 0.47 |
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