A Review on Particle Swarm Optimization Algorithm and Its Variants to Human Motion Tracking

Table 4

PSO’s 3D error in mm on Lee walk 20 fps with varying numbers of particles and likelihood evaluation.

Algorithm	Hierarchical search with hard partitioning (H-HP)	Hierarchical search with soft partitioning (S-HP)
PSO (30 particles)	58.80 ± 16.00 mm	42.10 ± 10.80 mm
PSO (40 particles)	52.10 ± 12.00 mm	38.40 ± 14.10 mm
PSO (50 particles)	50.60 ± 6.00 mm	34.20 ± 12.80 mm