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--- jvs:fscan:manual:chapter3:imagekeys:threshold [2012/02/21 22:20] – voyvodic
+++ jvs:fscan:manual:chapter3:imagekeys:threshold [2012/02/22 02:01] – voyvodic
@@ Line 41: / Line 41: @@
                        Upper = intens + flg/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