Page 15
Cutoff Filter
(PosiTector RTR-3D probes only)
To optimize the analysis for a specific application, filters may be applied to the raw
image to remove undesirable profile characteristics prior to calculating the 2D and 3D
parameters. The long wavelength cutoff Gaussian filter attenuates features that have a
longer wavelength than the selected size.
The following Cutoff Filters are available:
None
0.08mm
0.25mm
0.8mm (default)
2.5mm
Discard
A side effect of the long wavelength cutoff filter is that values near the edge of the
evaluation length or area are skewed. To prevent these skewed values from affecting
2D and 3D parameter calculations, the values near the edges of the evaluation are
discarded. The Discard length is calculated from the long wavelength cutoff selected.
The following discard selections are available:
Discard none
Discard 1/2 (default)
Discard 1
2D Orientation
(PosiTector RTR-3D probes only)
2D parameters are calculated from a virtual trace across the image area. By default, this
trace is in the Horizontal X direction, parallel to the long axis of the replica tape. This
orientation can be changed if desired:
Horiz X (Horizontal X) (default)
Vert Y (Vertical Y)
Diag XY (Diagonal XY)
Diag YX (Diagonal YX)