An evaluation is carried out to compare the performance of interpolation of the proposed algorithm with a third party software i.e., Kubios HRV which is commonly used for HVR analysis.
Kubios HRV uses cubic spline interpolation . Five levels of interpolations i.e., very low, low, medium, strong and very strong are available in the software.
For evaluation we have only considered time domain features since time domain features are more sensitive to artifacts as we have seen from the previous discussion.
Table 4 shows the mean absolute differences when performing interpolation using the proposed algorithm (considering k=2) and Kubios HRV software (considering Interpolation level medium).
The algorithms are fist tested with 30 ‘With artifacts’ measurements where we can see that the proposed algorithm performs better.
However, the error is exceptionally higher for the software because of there is 3 measurements for which it somehow fails to manipulate.
So, a calculation is also performed without considering these 3 measurements in which the software performs better than the proposed algorithm.