. Author manuscript; available in PMC: 2009 Aug 1.

Published in final edited form as: Med Image Anal. 2008 Jan 17;12(4):397–412. doi: 10.1016/j.media.2007.12.005

Table 1.

The mean MLE scores and processing speed for eight ASD 4D images using four tracking techniques. Normalized MLE scores (0–100) were calculated every 25 frames according to Equation (10): 0 for the perfect match to 100 for the worst. The best results are shown in italic.

	Mean/Std conserr		Mean/Std abserr		Speeds/frame
	Frames 1–25	Frames 26–50	Frames 1–25	Frames 26–50	Speeds/frame
Block Matching	2.82±0.98	3.77±1.39	10.30±4.39	16.28±6.12	0.47
Optical Flow	5.36±2.96	5.92±3.19	13.19±6.14	12.82±4.42	25.70
Block Matching - Optical Flow	5.64±2.60	6.03±3.43	10.18±5.92	18.22±3.64	13.32
Block Flow	3.23±1.71	3.57±1.74	5.32±2.07	5.98±2.21	0.48