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EC FILTER - Extract Connected CLusters - FILTER

(9/11/97)

PURPOSE

Reads a SPIDER document file containing cluster number (index) and number of voxels (1) in the cluster. If the number of voxels < solicited minimum number or > solicited maximum number, then the voxels belonging to this cluster are set to value zero.

SEE ALSO

EC SELECT [Extract connected clusters - selection]
EC CLOSE [Extract connected clusters - merge close]
EC CL [Extract connected clusters]
EC STAT [Extract connected clusters - statistics]

USAGE

.OPERATION: EC FILTER

.CLUSTER DOC FILE: DOC001
[Name of document file. This document file may be edited output from the "EC STAT" operation.]

.CLUSTER INPUT FILE: VVV001
[Name of input file.]

.CLUSTER OUTPUT FILE: VVV002
[Name of output file.]

.RANGE OF CLUSTER SIZES RETAINED: -1,30
[Voxels in clusters having number of voxels outside this range will be set to background.]

NOTES

  1. Document file have number of cluster + 1 as key. The first register should contain number of voxels in the cluster. (The cluster number is incremented by one because zero key is not allowed and it is usefull to have a measure of the background which has value zero in the file).

SUBROUTINES

MAPFILT, MAPIM

CALLER

UTIL6

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