IPU 40108
Page 14 of 29
Edit the Contrast
Edit the Brightness
Default contrast
Default brightness
Increasing the contrast uses more of the outer colours
of the colour palette i.e. black and white in the
rainbow example.
Increasing the thermal brightness uses more of the
upper half of the colour bar.
Reducing the contrast uses less of the outer colours
of the colour palette, and uses more of the central
colours i.e. green and yellow in the rainbow example.
Decreasing the thermal brightness uses more of the
lower half. See the examples in Figure 18 for more
information.
Figure 19: These 6 figures show the effect of increasing and decreasing the auto mode’s brightness and
contrast.
The practical advantage of this is that the user can completely control the appearance of the image without
having to adjust the level and span manually when viewing different scene temperatures.
NOTE: The brightness and contrast can be reset back to the defaults by pressing hot button 4 to
manual mode, and then hot button 4 again back to auto mode.
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