jvs:fscan:manual:chapter2:expression:dilate
fScan Reference Manual, Chapter 2 (CmdLineOptions:Expr): Dilate
Dilate -- Expand an intensity region in a 3D image volume
usage: -expr dilate val maskbits newval flag nmatch nneighbors
- VAL - “Inside” value (or Percent value if (FLAG & (4|8))
- MASKBITS - voxel data values to consider for comparing with VAL (DATABITS is inverse of MASKBITS)
- NEWVAL - bit-value to turn on when adding (dilating) a voxel
- If NEWVAL is negative and MASKBITS is zero, then neighboring data voxel values will be used when dilating into “empty” voxels.
- FLAG:
- 0 - (default)
- 2 - Erode/dilate in 2-D plane only
- 4 - Stop on dark edge (voxel darker than (100-VAL)% of inside neighbors (Needs MASKBITS set)
- 8 - Stop on bright edge (brighter than (100+VAL)% of inside neighbors
- 16 - Dilate all non-zero values except VAL (useful for filling in around VAL areas)
- NMATCH - number of adjacent voxels matching criterion needed for dilation (default=1)
- NNEIGHBORS - number of neighboring voxels to consider (default=26 if 3D, 8 if 2D)
If MASKBITS is non-zero, it is used to mask both the input data values and NEWVAL; only those data bits are considered during comparisons and only the NEWVAL bits are changed during dilation.
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jvs/fscan/manual/chapter2/expression/dilate.txt · Last modified: 2024/06/21 15:44 by 127.0.0.1