Figure 46 2D 3x3 Filtering Concept Examples
For all the parameters except velocity, the interpolated value for filling is computed as the
arithmetic mean of all available neighbors. The procedure for velocity is similar, except that
the 8-bit angles are first converted to Cartesian vectors, then averaged and converted back
to polar.
The 2D 3x3 speckle filter can be used with or without the 1D speckle filtering. However, the
data is cleaner if both filters are applied.
The 2D 3x3 speckle filter has some interesting properties when combined with other
algorithms.
7.5.3.2.1 Dual-PRF Unfolding
Dual-PRF velocity unfolding is computed within the 3x3 filter when both are enabled. There
are two steps to the process:
Chapter 7 – Processing Algorithms
213
Summary of Contents for RVP900
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