FLIR Exx series, User Manual

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Achieving a good image 13
13.3 Adjusting the infrared image
13.3.1 General
An infrared image can be adjusted automatically or manually.
In automatic mode, the camera continuously adjusts the level and span for the best image
presentation. The colors are distributed based on the thermal content of the image (histo-
gram color distribution). The temperature scale to the right of the screen shows the upper
and lower temperatures of the current span.
In manual mode, you can adjust the temperature scale to values close to the temperature
of a specific object in the image. This will make it possible to detect anomalies and smaller
temperature differences in the part of the image of interest. In manual mode, the colors
are distributed evenly from the lowest to the highest temperature (linear color distribution).
This is indicated by lines on the temperature scale.
There are two different settings for the manual adjustment mode:
• Level, Span : With this setting, you can manually adjust the level and span.
• Level, Max, Min : With this setting, you can manually adjust the level. You can also
change the upper and lower temperatures individually.
Select the type of manual image adjustment mode under ( Settings ) > Device settings
> User interface options > Manual adjustment mode .
When manual image adjustment mode is active, the status icon is displayed.
• In live mode, select ( Temperature scale ) and then ( Auto ) or ( Manual ) to en-
ter automatic or manual image adjustment mode.
• In preview/edit mode, manual image adjustment mode is active.
Note You can also assign image adjustment functions to the programmable button. For
more information, see section 10.12 Assigning functions to the programmable button ,
page 37.
• Switch between auto and manual : Allows you to switch between the automatic and
manual image adjustment modes.
• Auto adjust the manual temperature scale : Allows you to perform an automatic adjust-
ment of the image while remaining in manual image adjustment mode.
13.3.2 Example 1
Here are two infrared images of a building. In the left image, which is auto-adjusted, the
large temperature span between the clear sky and the heated building makes a correct
analysis difficult. You can analyze the building in more detail if you change the temperature
scale to values close to the temperature of the building.
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