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A COMPARISON AND EVALUATION OF MOTION INDEXING ...

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Figure 5.6: False negatives for Feature-based technique.<br />

The feature-based technique finds the exact query sequence in each dataset<br />

match. The results are accurate but are constrained by the fact that the binary<br />

sequence of the query and the data file should be exactly the same. That reduces the<br />

number of matches and results in large number of false negatives (see Fig 5.6). The<br />

remarkable thing about this technique is that it finds all the occurrences of the query<br />

in the data file and not just the best possible match. The number of false positives<br />

is very low (see Fig 5.7).<br />

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