**fScan Reference Manual, Chapter 3 (KeyCmds:WinKeys): threshold **
===== Threshold -- Control thresholding features =====
**usage: mode,flag,flag2 K**

       K    toggle threshold on/off
  
    MODE: 0 - turn off thresholds
  
          1 - turn on thresholds
  
          2,flag,flag2 - set threshold flags to FLAG
             Threshold FLAG values:
              1 - On if value >= low thresh
              2 - On if value <= high thresh
              3 - On if value >= low thresh AND value <= high thresh
              4 - On if value >= low thresh OR value <= high thresh (low>high)
              5 - On if value <= low thresh
              6 - On if value >= high thresh
            010 - only show boundaries of threshold region
            020 - high thresh is band-width, must be >= low AND <= (low+high)
            040 - binary     
           0100 - fill
           0200 - upper
           0400 - tenths
          01000 - adaptive
          02000 - roi
          04000 - wrap
  
	     Note, FLAG2 lets you change only selected bits:
             FLAG2= -1 - set bits to FLAG (default)
                     0 - turn off bits specified in FLAG
                     1 - turn on bits specified in FLAG
                     2 - toggle bits specified in FLAG
  					
          3,thresh,rangemin,rangemax - set min threshold values
  
          4,thresh,rangemin,rangemax - set max threshold values
  
          5,flg,delta - set threshold(s) to value at cursor
                FLG  1 - set low thresh to  Value - Delta
                     2 - set high thresh to Value + Delta
                     4 - Delta is percentage of Value
                Examples (assuming Value at cursor is 3000):
                  5,1K        low=3000       high=unchanged
                  5,2,100K    low=unchanged  high=3100
                  5,6,10K     low=unchanged  high=3300
                  5,7,20K     low=2400       high=3600
  
          6,Nbits,mask,flg - clear low data bits for masking
             FLG: 1 - adjust brightness scale and threshold values
                  2 - shift if necessary, but otherwise don't clear low bits
             Note: Bit shifting is automatic in MODE 7.
  
          7,flg,setvalue - convert threshold to bit mask
             FLG: Bit-mask controlling filling options
                 1 - set values >= thresh1 to SETVALUE
                 2 - set values <= thresh2 to SETVALUE
                 3 - set values >= thresh1 AND <= thresh2 to SETVALUE
                 4 - set values >= thresh1 || <= thresh2 to SETVALUE (assumes thresh1 > thresh2)
                 5 - set values <= thresh1 to SETVALUE
                 6 - set values >= thresh2 to SETVALUE
               010 - clear low bits before setting mask
               020 - use 2 bits for mask
               040 - set voxels that DON't match condition (FLG&7)
   
          8,nbits - set number of mask bits to NBITS
            Note: This parameter may be automatically set using 6K or 7K functions.
  
          9 - show threshold values

**See Also:**\\
[[jvs:fscan|fScan Home]],
[[jvs:fscan:manual|fScan Manual]],
[[jvs:fscan:manual:chapter3|KeyCmds]],
[[jvs:fscan:manual:chapter3:winkeys|WinKeys]],
[[jvs:fscan:manual:help|Manual Help]]