Abstract
This study deals with methods focused on estimating blood velocity. The
estimation of the linear trend function of a non-stationary signal based on the
adaptive recursive estimation of the mean value function is used for the
determination of the time delay of two indicator dilution curves. The filter
property of this trend operator depends on the choice of a constant parameter c,
the so-called adaptation factor. The functional connection between the filter
property and the adaptation factor is considered in such a way that an objective
calculation of arterial blood velocity in retinal vessels is possible.
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