We show the system used to obtain the results allowed.

System used:

• Windows 7
• 64 bits
• 4Gb RAM
• Intel Core Quad 2.33 Ghz
• Images used: 320×240 pixels

Training time:

• 4D-DPM: 8.10 min/frame
• DPM: 8.54 min/frame

Testing time:

• 4D-DPM: 7.20 seg/frame
• DPM: 9.21 seg/frame