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A COMPARISON AND EVALUATION OF MOTION INDEXING ...

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Figure 5.2: False negatives for PCA-SVD technique.<br />

The PCA based technique PCA-SVD first segments the data according to dif-<br />

ferent behaviors and then tries to find matching segments for the given motion files.<br />

The results reveal that the technique identifies many false positives (see Fig 5.3).<br />

The main reason for this is the improper data segments (inaccurate start and end<br />

points) created by the technique which deteriorate indexing. However, the number of<br />

false positives is low (see Fig 5.2).<br />

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