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. Author manuscript; available in PMC: 2010 Mar 17.
Published in final edited form as: Med Phys. 2006 Jun;33(6):1695–1706. doi: 10.1118/1.2198187

FIG 18.

FIG 18

Diagram of trajectory tracking. In(u,υ) is the gray scale value of position (u,υ) in view # n, after processing. N is the total number of views, k is the window size set from observation so that a 2k*2k window completely covers one BB and the adjacent BB is also located with this window.