FLIR Ranger HRC MS - Color Distribution; Digital Detail Enhancement

Ranger HRC™ operator´s manual – Functions and features
28 Publ. No. TM 614 006 699 Rev B – ENGLISH (EN) – Oct 30. 2008
5.2.5 Color Distribution
There are two Color Distribution modes; Linear and Histogram.
In Linear mode, the colors are distributed linearly from the darkest
to the brightest pixel in the image.
In Histogram mode, the colors are distributed based on the contents
of the image.
The Histogram mode normally gives the best image, but for small details
the Linear mode may be better. The Linear mode also gives a more intui-
tive perception of the temperature contents.
5.2.6 Digital Detail Enhancement
Digital Detail Enhancement (DDE) is a function that enhances the visibi-
lity of details in the IR image.
In principle, DDE separates the image signal into two parts:
The background image, which contains the low frequency, high amp-
litude part if the image.
The detail image, which contains the high frequency, low amplitude
part of the image.
The two parts can be scaled separately, before they are merged to produce
an output image. This allows the system to output an image where ne
details are visible even in a very high dynamic range scene.