380 WM-OM-E Rev I
possible to store a reference of a single sector and compare it to subsequent acquisitions
containing multiple sectors. It is also not possible to compare a split sector to an unsplit or
differently split sector. The reference and the acquisition must basically match.
Local Feature Concepts
Overview
The term "local feature computation" indicates that a parameter computed on a waveform is
determined only by information in the immediate vicinity of a specified feature of that waveform.
The DDA defines a local feature as a waveform peak followed by a trough, like this:
However, it is not the opposite --- a trough followed by a peak. The diagram below shows a single
local feature: the first peak and the trough that follows it.
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