jvs:fscan:manual:chapter1:thresholding
fScan Reference Manual, Chapter 1 (Topics): Thresholding
Thresholding -- Using intensity thresholding
Displayed image intensity values can be clipped based on threshold settings. Thresholding can be controlled interactively using the Threshold ('K') command. The Taskbar “Thresh” icons provide a graphical interface for the 'K' command options. Preset threshold values can also be stored as parameters in XML image header files if desired. The <F7> keyboard key also provides a convenient way to set standard t-test threshold levels (Flag 4: +4.0 & -4.0).
Overview
For each image window there are 4 parameter values that control intensity thresholding:
- Mode - controls whether intensity thresholding is active
- Flag - controls how the Low and High threshold values are used
- Low threshold - low intensity value (floating point number)
- High threshold - high intensity value (floating point)
Mode options:
- 0 - thresholding is off; all intensity values are displayed
- 1 - thresholding is on; only display intensity values meeting the threshold condition
Flag options (threshold conditions):
- 1 - show values >= low threshold
- 2 - show values ⇐ high threshold
- 3 - show values >= low threshold AND ⇐ high threshold (low<high)
- 4 - show values >= low threshold OR ⇐ high threshold (low>high)
- 8 - only show boundaries of thresholded regions
- 16 - high threshold is a range; show values >= low AND ⇐ low+high
See Also:
Threshold ('K')
jvs/fscan/manual/chapter1/thresholding.txt · Last modified: 2024/06/21 15:44 by 127.0.0.1