FLIR ThermoVision Micron User Manual page 21

ThermoVision® Micron/A10 User's Guide 412-0006-10 Version 130
1. Smart-Scene. In Smart-Scene mode, image contrast and brightness are optimized
automatically as the scene varies. This mode provides an Automatic Gain Control
(AGC) which is based on a histogram-equalization (HEQ) algorithm. The slider above
allows for the "Max Gain" term of the Smart-Scene to be manipulated based at the user's
need. The input windows for specifying contrast, brightness, and brightness bias are
grayed out on the Control Panel when Smart-Scene is enabled since they are not used in
this mode.
2. Auto-Bright. In Auto-Bright mode, image brightness is optimized automatically as the
scene varies but contrast is manually specified. Generally, Smart-Scene produces a better
image than Auto-Bright, but in some cases, specifying contrast manually can improve the
display of a specific feature in a scene. When Auto-Bright mode is selected, input
windows for specifying contrast and brightness-bias values are available on the Control
Panel. To specify a value, type it directly into the appropriate input window or use the
up/down arrow keys. Valid contrast values range from 0 to 255, with a smaller value
producing less contrast and a larger value producing more. The brightness bias value
ranges from –2047 to +2047. When brightness bias is 0, the camera applies the value of
brightness determined to be optimal for the current scene conditions. Increasingly
negative values cause a darker image than optimal whereas increasingly positive values
cause a brighter image.
3. Once Bright. In Once Bright mode, image brightness and contrast are both specified
manually, which can occasionally improve the display of specific features in a scene,
particularly those that are significantly hotter or colder than the average scene
temperature. Upon entry into the Once Bright mode, Micron/A10 automatically
optimizes the value of brightness just as in Auto-Bright mode. However, the brightness
value is not continuously updated as the scene varies or as camera temperature changes.
Valid brightness values range from 0 to 16383, with a smaller value producing a darker
image and a larger value producing a brighter imager. Brightness bias is not used in this
mode.
4. Manual. Image brightness and contrast are both manually specified in Manual mode.
Unlike the Once Bright mode described above, the brightness value is not automatically
optimized upon entry into the Manual mode. Instead the last specified values for both
brightness and contrast are applied. (The power-on defaults are applied if brightness
and/or contrast have not already been specified using the Control Panel.) Brightness bias
is not used in this mode.
Note: In Manual and Once Bright modes, the brightness setting must be updated as the camera
temperature changes. To avoid this issue, it is recommended to use Smart-Scene or Auto-Bright
modes when possible.
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