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Calibir GXM640 IR Camera User's Manual
Operational Reference
91
Contrast / Brightness Feature Descriptions
The following table describes these features along with their view attribute.
Table 21: Contrast / Brightness Feature Descriptions
Display Name
Feature & Values
Description
View
Contrast Mode
contrastMode
Determines how images are remapped from
16-bits to 8-bits.
Beginner
DFNC
Dynamic Adaptive
AdaptiveDynamic Remapping depends on the contrast feature
setting. The algorithm will attempt to
provide a well contrasted image by adapting
to the dynamic range of the scene.
Static
Static Remapping
depends
on
the
contrastMinValue and contrastMaxValue
feature settings.
Fixed Adaptive
AdaptiveFixed Remapping depends on the camera
temperature and the contrast and
brightness features settings.
Contrast
contrast
When the output pixel format is 8-bits, the
range
compression
contrast
setting
determines the range of values in the 16-bit
image that are mapped to 8-bit output. The
higher the contrast, the more the values are
stretched across the 8-bit range. When
contrast is set to the maximum value (255),
the image is effectively almost binarized.
Beginner
DFNC
Brightness
brightness
Sets the brightness value. A brightness
setting greater than 128 make the image
lighter (shifts pixel values up); lower than
128 makes the image darker (shifts pixel
values down). This feature is only available
when the Contrast Mode (contrastMode)
feature
is
set
to
Fixed
Adaptive
(AdaptiveFixed).
Beginner
DFNC
Contrast zone x1
contrastZoneX1
Horizontal coordinate of the top-left corner
of the contrast zone.
Expert
DFNC
Contrast zone x2
contrastZoneX2
Horizontal coordinate of the bottom-right
corner of the contrast zone.
Expert
DFNC
Contrast zone y1
contrastZoneY1
Vertical coordinate of the top-left corner of
the contrast zone.
Expert
DFNC
Contrast zone y2
contrastZoneY2
Vertical coordinate of the bottom-right
corner of the contrast zone.
Expert
DFNC
Maximum
Gain
Enable
contrastMaxGainEnable
Sets the enable state of the gain limit
feature. When enabled, and the scene
contains very little contrast, the amount of
contrast stretching applied to the input
image is limited by the maximum gain. This
reduces
noise
amplification.
This feature is available when the Contrast
Mode (contrastMode) is set to Dynamic
Adaptive (AdaptiveDynamic).
Beginner
DFNC
Maximum
Gain
Value
contrastMaxGainValue
Sets the maximum gain to use for contrast
stretching the input image. Higher values
result in more contrast stretching. This
feature is only available when the Maximum
Gain (contrastMaxGainEnable) feature is
enabled.
Beginner
DFNC
Minimum
Input
Value
contrastMinValue
Sets the minimum input 16-bit pixel value
when the Contrast Mode (contrastMode) is
set to Fixed Adaptive (AdaptiveFixed).
Beginner
DFNC
Maximum
Input
Value
contrastMaxValue
Maximum input value for static contrast
Beginner
DFNC