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16
Achieving a good image
16.1 General
A good image depends on several different functions and settings, although some func-
tions and settings affect the image more than others.
These are the functions and settings that you need to experiment with:
• Adjusting the infrared camera focus.
• Adjusting the infrared image (automatically or manually).
• Selecting a suitable temperature range.
• Selecting a suitable color palette.
• Changing the measurement parameters.
• Performing a non-uniformity correction (NUC).
The following sections explain how to work with these functions and settings.
In some situations, you may also want to hide the overlay graphics for a better view.
16.2 Adjusting the infrared camera focus
It is very important to adjust the focus correctly. Incorrect focus adjustment affects how
the image modes work. It also affects the temperature measurement.
16.2.1 Manual focus
You can adjust the focus manually by rotating the focus ring. For more information, see
section 13.6 Adjusting the infrared camera focus manually, page 33.
16.2.2 Autofocus
You can autofocus the infrared camera by the press of a button:
• The camera can be configured to autofocus when you push the Save button half-way
down. To enable the autofocus function of the Save button, select
Save options & storage > Save button half-press = Autofocus.
• You can assign the autofocus function to the programmable button
information, see section 13.11 Assigning functions to the programmable buttons,
page 36.
The infrared camera can also be set up to perform continuous autofocusing. For more in-
formation, see section 13.8 Continuous autofocus, page 34.
16.3 Adjusting the infrared image
16.3.1 General
An infrared image can be adjusted automatically or manually.
In automatic mode, the camera continuously adjusts the level and span for the best im-
age presentation. The colors are distributed based on the thermal content of the image
(histogram 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 small-
er temperature differences in the part of the image of interest. In manual mode, the col-
ors are distributed evenly from the lowest to the highest temperature (linear color
distribution).
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