Ranger HRC™ operator´s manual – Optimizing the IR Image
Publ. No. TM 614 006 699 Rev B – ENGLISH (EN) – Oct 30. 2008 177
12.2.6 Adjustment mode
There are four adjustment modes selectable via the IR Camera menu sys-
tem; Auto Level, Auto Level-Span, DDE and Manual.
In Auto Level mode, level is automatically adjusted.
In Auto Level-Span mode, both level and span are automatically
adjusted.
DDE Digital Detail Enhancement) is an automatic adjustment mode
for level and span, which also enhances the visibility of details in the
scene.
In Manual mode, level and span adjustments are made manually.
The most suitable mode depends on many factors. Auto mode normally
gives a good image quality, but in scenes with low or high contrast DDE
and/or Manual mode may be better.
NOTE: For typical settings in low and high contrast scenes, please refer to section 12.3.
12.2.6.1 Selecting mode
Toggle between Auto, DDE and Manual to see which of the modes suits
the current situation best.
NOTE: If DDE mode is selected when manual adjustments have been made in Auto mode,
the manual adjustments will still apply. This is indicated with the symbol * in the top line
status bar: DDE*. It is recommended to set the brightness and contrast values to 0, see
section 12.2.7.1.
NOTE: In Manual mode, frequent manual adjustments (see section 12.2.7.3) are needed
to achieve a good image.
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