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Features and Configuration Options
Calibir GXM640 IR Camera User's Manual
For example, using the same sample image from the static contrast mode example (16-
bit pixel range max-min = 147), the dynamic adaptive contrast mode stretches the
image automatically (max gain feature = off) such that the resulting 8-bit image uses
most of the dynamic range available (~215 DN) without saturating. This results from the
fact that the dynamic adaptive contrast has calculated a gain of ~1.5 to apply to the
image.
Table 13: Maximum Gain Off Example
Image
8-Bit Image Histogram
Max Gain = Off
Max-Min 215
If however, the maximum gain was set to 1, the 16-bit image would not be stretched
and the max-min range remains the same in the 8-bit image.
Table 14: Maximum Gain Setting Examples
Image
8-Bit Image Histogram
Max Gain = 1
Max-Min 147
A maximum gain of less than 1 reduces the max-min range in the 16-bit image when
mapping to 8-bits. For example, a maximum gain of 0.5 effectively reduces the 8-bit
range in half from that present in the 16-bit image.
