Example 2; Procedure; Performing A Non-Uniformity Correction (Nuc); What Is A Non-Uniformity Correction - FLIR T6 Series User Manual

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Working with images

14.5.3 Example 2

Here are two infrared images of an isolator in a power line. To make it easier to analyze
the temperature variations in the isolator, the temperature scale in the right image has
been changed to values close to the temperature of the isolator.
Automatic

14.5.4 Procedure

Follow this procedure:
1. In live mode, push the button
2. To change the temperature scale minimum and maximum limits simultaneously,
move the joystick up/down.
3. To change the temperature scale minimum or maximum limit, do the following:
• Move the joystick left/right to select (highlight) the maximum or minimum
temperature.
• Move the joystick up/down to change the value of the highlighted temperature.
4. (Optional step). In preview/edit mode, push the button
adjust sequence.
14.6 Performing a non-uniformity correction
(NUC)

14.6.1 What is a non-uniformity correction?

A non-uniformity correction is an image correction carried out by the camera software to
compensate for different sensitivities of detector elements and other optical and geomet-
rical disturbances 1 .

14.6.2 When to perform a non-uniformity correction?

The non-uniformity correction process should be carried out whenever the output image
becomes spatially noisy. The output can become spatially noisy when the ambient tem-
perature changes (such as from day to night operation, and vice versa).
14.6.3 Procedure
To perform a non-uniformity correction, push and hold the Image archive button
more than 2 seconds.
1. Definition from the impending international adoption of DIN 54190-3 (Non-destructive testing – Thermographic
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testing – Part 3: Terms and definitions).
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to enter manual image adjust mode.
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