FLIR Camera Adjustments
102-PS242-100-01
Rev110
June 2014
Page 11 of 28
It is also important to note that changes in levels of grey are more perceptible to a human observer at
lower levels of illumination. This is because a change from 5 to 10 counts is 100% and a change from 245
to 250 is about 2%. By lowering the ITT Mean, you can shift the luminance to a lower value so that a
human observer will be more capable of seeing small changes in the scene. If you are using analytics, the
performance will not likely be improved by this change and the default setting of 127 is recommended.
Figure 7: Plateau: 250, ITT: 110, Max Gain: 8
Figure 8: Plateau: 250, ITT: 150, Max Gain: 8
The final AGC parameter is the Max Gain. To demonstrate this, it will be better to look at a scene with
very low contrast. The scene used was a uniform wall with an empty paper cup that was slightly warmer
than the wall. Notice the very narrow spike in the 14-bit data and the very small bump just to the right of
the spike.
