Ranger HRC™ operator´s manual – Functions and features
Publ. No. TM 614 006 699 Rev B – ENGLISH (EN) – Oct 30. 2008 27
5.2.3 Adjustment modes
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.
5.2.4 Adjust image
Adjust image is a feature that allows manual adjustments of the image
with regards to level and span, or the corresponding brightness and cont-
rast.
In Auto Level-Span and DDE mode, level and span are automatically ad-
justed. The Adjust image feature makes it possible to tune the automatic
values, by adjusting brightness and contrast with a percentage offset.
In Auto Level mode, level is automatically adjusted. The Adjust image
feature is used to manually adjust the span value. The Adjust image fea-
ture also makes it possible to tune the automatic level value, by adjusting
brightness with a percentage offset.
In Manual mode, both level and span are adjusted manually. Frequent
adjustments and ne-tuning are needed to achieve a good image quality.
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