Figure 5
From: Tracking objects outside the line of sight using 2D intensity images
Tracking of an unknown object, or in an unknown room.
(a) Result of Experiment 3: Positional tracking as in Experiment 1, but with no knowledge about the object shape. We used a single oriented surface element for the light transport simulation. (b) Result of Experiment 4: Positional tracking as in Experiment 1, but without subtracting the pre-calibrated room response. The estimated absolute position greatly deviated from the ground-truth position (shaded areas). (c) Subtraction of a linear fit significantly reduced the tracking error and made the tracking task feasible even in the absence of a background measurement. In all cases, the standard deviation (error bars) remained small, indicating that changes in position could still be robustly detected.
