Experimental Results

To determine the validity of this technique for frame alignment, tests were conducted on a number of scenes.

Figure 2: Alignment of sequences (a) Searching over the range of possible shifts, (b) Shift determination in Fourier Domain. (See text for more details)

(a)

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(b)

A simulated explosion of the teapot, with the various fragments flying off in different directions with different but constant acceleration, was used for experimentation. Figure 1 shows a few frames from the image sequences of the exploding tea pot from two different view points. Tests were carried out to evaluate the applicability of this technique for frame alignment, by varying the starting point of the second video sequence. In all the cases the proper shift value was recovered. In the first experiment, the two sequences were misaligned by seven frames. The fit-error graph obtained on searching over the possible range of shifts, for aligning the sequences is shown in Figure 2(a). Figure 2 (b) shows the amplitude spectrum of the IDFT of the ratio $\frac{\kappa^{\prime}_p(l)[k]}{\kappa^{\prime}_p(0)[k]}$ computed from two views of general planar motion, misaligned by seven frames. It can be seen that there is a distinct peak at the proper shift value.