Fig 4.

A modification of the image from the MATLAB dtw() program [20] is useful when empirically comparing the results from the DTWA algorithms for the Sequin R2-55-3. Entries in the upper window are scaled so that the narrower white band in A) shows that the DBA DTWA produces a consensus, black, with a length closer to the gold standard than either the B) SSG, green, or C) MM, red, algorithms. The lower window displays a short, offset version of the aligned signals helping to illustrate the relative level of distortions between the DTWA consensuses: B) High for SSG DTWA, C) medium for MM with A) only the DBA consensus signal remaining 20% longer than the gold signal providing an obvious indication of hidden distortions.