FLIR Tau Camera TAU-0035-00-10 User Manual page 41

Tau User's Manual
Linear Histogram: Image contrast and brightness (gain and level) optimized
automatically based upon scene statistics using a linear transfer function. Controls for
the ITT Mean (sets grey scale midpoint) and Max Gain (AGC gain) are adjustable by
entering the value in the Automatic Parameters section. The Linear Histogram
algorithm uses scene statistics to set a global gain and offset (contrast and
brightness) for the image. Upon entry into the linear histogram mode, the currently-
stored values are applied (i.e. the power-on defaults or the last saved values).
Note
In Manual mode and Once Bright mode, the brightness setting must be updated as the
camera temperature changes. To avoid this issue, it is recommended to use Automatic or
Auto Bright right modes when possible. Also, AGC mode will only affect the digital data output
if the Digital Video output mode is set to 8-bit data. The 14-bit digital data bypasses the AGC
sections of digital processing.
Linear Parameters:
Bright, and Manual modes, these settings are contextually active
depending on which Algorithm is selected. Each of their settings is
described above.
Once Bright – Only the Contrast control is active.
Auto Bright – The Brightness Bias and Contrast controls
are active.
Manual – The Brightness and Contrast controls are active.
Automatic Parameters:
Automatic and Linear Histogram modes, these settings are
contextually active depending on which AGC algorithm is
selected. Each of their settings is described above as they
pertain to the particular Algorithm.
Automatic – The Plateau Value, ITT Mean, and Max
Gain controls are active.
Manual – The ITT Mean and Max Gain controls are
active.
TAU-0035-00-10, version 150
Used for fine tuning the Auto Bright, Once
Used for fine tuning the
June 2011
3—Basic Operation of the Tau and GUI
3-25