Ranger HRC™ operator´s manual – IR Camera software
Publ. No. TM 614 006 699 Rev B – ENGLISH (EN) – Oct 30. 2008 93
Menu choice Possible choices Explanation
Filter • Low
• High
• Off
Use the navigation pad to select the lter type
– Low, High or Off (no lter).
Press the ENTER button to conrm.
Zoom
interpolation
• On
• Off
Use the navigation pad to enable or disable the
zoom interpolation.
Interpolation is a mathematical process used to
estimate values between known point obser-
vations. The camera software interpolates the
resolution by mathematically analyzing what
would be the most plausible value of the closest
neighbor of a pixel.
The zoom interpolation works only during an
digital zoom sequence.
Shutter • Off
• Internal
• External
Use the navigation pad to select the shutter type
used during a NUC.
Press the ENTER button to conrm.
NUC = Non-Uniformity Correction.
Off – no shutter is used during the camera
calibration. The image is calibrated against the
actual scene at which the camera is looking. This
method allows for calibration against surfaces
with a representative temperature compared to
the actual scene temperature. This is normally the
preferred method provided that a surface with a
homogeneous temperature is used (e.g clear sky,
smooth wall surface, a piece of black plastic foam
held against the front lens, etc).
Internal – the image is calibrated against a shutter
inside the camera which has an even temperature
distribution over its surface – normally warmer
than the scene temperature.
Shutter
(Continue)
External – the external shutter (front lens cover) is
used as the thermal reference during calibration.
The shutter closes at NUC and re-opens after com-
pleted calibration. Normally, the external shutter
has a temperature close to the scene temperature
and is thus a representative calibration body.
NOTE: Keep in mind that disabling the shut-
ter may impair the infrared imaging, unless
a scene with an even temperature is used
for calibration!
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