Tamarisk
®
Camera Control Software User Guide
corresponding set of offsets determined as part of the factory calibration process. The operator
can also initiate a NUC at anytime and has the option of selecting “1-Point Calibration” or “1-
Point (No Shutter)” from the camera software control GUI.
“1-Point Calibration” (shutter closed)
Calibration is performed with the shutter closed preventing scene IR energy being received by the
detector. With the shutter closed, the sensor sees a uniform temperature when performing the
NUC. The shutter will momentarily close while calibration is performed.
“1-Point (No Shutter)” (Shutter open, “Through-the-lens”)
Shutterless calibration is use for optimal image performance by removing unwanted optical noise.
This calibration is a, “through-the-lens,” one-point calibration. In this case, a uniform temperature
object must be placed in front of the lens while the one-point calibration is performed.
5.2.2 Automatic Calibration (One-Point Calibration)
The camera is programmed at the factory to automatically perform a 1-point on power-up, when
the FPA temperature transitions across predefined temperature zones, and every 5 minutes (per
the default automatic calibration time setting). The user can disable the automatic calibration
timer by entering a 0 in the automatic calibration field.
5.2.3 Image Orientation
The image can be displayed in four operator-selectable orientations as shown below:
Figure 21. Normal Orientation
Figure 22. Flip Horizontally
Figure 23. Flip Vertically
Figure 24. Flip Vertically and Horizontally
5.2.4 Polarity
Polarity switches the displayed image from White Hot to Black Hot polarity (refer to Figure 25
and Figure 26). White Hot polarity is set as factory default. Reversing the image polarity can
improve the apparent detail in some scenes, especially in the presence of bright ambient lighting
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