Differences

This shows you the differences between two versions of the page.

--- jvs:fscan:manual:chapter2:expression:segment [2014/08/04 16:03]
127.0.0.1 external edit
+++ jvs:fscan:manual:chapter2:expression:segment [2023/02/23 18:43] (current)
@@ Line 1: / Line 1: @@
 **fScan Reference Manual, Chapter 2 (CmdLineOptions:Expr): segment**
-===== segment -- =====
+===== segment -- Assign contiguous voxels with similar values to different clusters =====
- **usage:  -expr segment **\\
+ **usage:  -expr segment [flag value]**\\
+The SEGMENT command process a 3-D image map looking for voxel values greater than or equal to VALUE.  Each time it finds such a voxel it uses a variation of the [[jvs:fscan:manual:chapter2:expression:flood|flood]] function to find all other voxels greater than VALUE contiguous with the first, and assigns all those values a new "cluster" number.  Clusters can have as few as 1 voxel. Cluster values start at 1, and increase by 1 for each new cluster found.
+VALUE: default is 1
+FLAG:\\
+- default\\
+- also look for negative voxel values, less than or equal to -VALUE (default is just positive)
 **See Also:**\\
+[[jvs:fscan:manual:chapter2:expression:flood|Flood]],
+[[jvs:fscan:manual:chapter2:expression:peak|Peak]]
 [[jvs:fscan|fScan Home]],
 [[jvs:fscan:manual|fScan Manual]],

Brain Imaging & Analysis Center