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--- jvs:fscan:manual:chapter2:expression:peak [2014/08/04 16:03]
127.0.0.1 external edit
+++ jvs:fscan:manual:chapter2:expression:peak [2023/02/23 18:43] (current)
@@ Line 1: / Line 1: @@
 **fScan Reference Manual, Chapter 2 (CmdLineOptions:Expr): Peak**
-===== Peak -- =====
+===== Peak -- find local maxima/minima =====
- **usage:  -**\\
+ **usage:  -e peak minval flag**\\
+The PEAK command compares the intensity value of each voxel with the intensities of its 26 immediate neighbors. It results in a map image, in which each new voxel is a flag (see below).
+FLAG:\\
+- only local extreme values\\
+- consider negative peaks as well\\
+- save peak locs as ROI points
+Return values (combined as bitflag):\\
+- has lower neighbor (or higher if neg)
+- has equal neighbor
+- has higher neighbor (but not if FLAG&1)
 **See Also:**\\
+[[jvs:fscan:manual:chapter2:expression:gradient|Gradient]],
+[[jvs:fscan:manual:chapter2:expression:segment|Segment]],
+[[jvs:fscan:manual:chapter2:expression:descend|Descend]]
 [[jvs:fscan|fScan Home]],
 [[jvs:fscan:manual|fScan Manual]],

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