Differences

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

--- jvs:fscan:manual:chapter3:imagekeys:threshold [2012/02/21 22:20]
voyvodic
+++ jvs:fscan:manual:chapter3:imagekeys:threshold [2023/02/23 18:43] (current)
@@ Line 19: / Line 19: @@
 - fill flag (?)
 - adjust thresholds by tenths (default is whole units)
+- adjust thresholds by hundredths
+- adjust thresholds by thousandths
 - only activate thresholds within active ROI
              Note, FLAG2 lets you change only selected bits:
@@ Line 38: / Line 40: @@
 - set upper threshold
                  >1 - set both thresholds:
-                       Lower = intens - flg/2
+                       Lower = intens - flag/2
-                       Upper = intens + flg/2
+                       Upper = intens + flag/2
 ,Nbits,mask,flg K
+            NBITS: Number of low bits to use for mask bits (default 1)
+            MASK:  Bit mask for sampling high data bits (default is -NBITS-1 )
             FLG: 1 - adjust brightness scale and threshold values
 - shift if necessary, but otherwise don't clear low bits
+- set 1 bit for all voxels where MASK value is non-zero
+- set 2 bit for all voxels where MASK value is non-zero
+- set 3 bit for all voxels where MASK value is non-zero
 ,flg,fillval,datamask,low,high K       convert threshold to bit mask
             FLG: 1-6 - same as 2K values

Brain Imaging & Analysis Center