Performing A Non-Uniformity Correction (Nuc); What Is A Non-Uniformity Correction; When To Perform A Non-Uniformity Correction; Procedure - FLIR T4xx series User Manual

14 Working with images
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.

14.7 Changing the temperature range

14.7.1 General

You must change the temperature range according to the expected temperature of the
object you are inspecting.
14.7.2 Procedure
Follow this procedure:
1. Push the joystick to display the menu system.
2. Use the joystick to go to
3. Push the joystick to display the Settings menu.
4. Select Device settings and push the joystick.
5. Select Set up camera and push the joystick.
6. Select Camera temperature range and push the joystick.
7. Select the appropriate temperature range and push the joystick.
Note
You can also assign the function Switch temperature range to the programmable button. Select
(Settings) > Programmable button > Switch temperature range.

14.8 Hiding overlay graphics (programmable button)

14.8.1 General
Overlay graphics provide information about an image, e.g., measurement functions and
parameters. You can choose to hide all overlay graphics.
1. Definition from the impending international adoption of DIN 54190-3 (Non-destructive testing – Thermographic
testing – Part 3: Terms and definitions).
#T559879; r.15723/15723; en-US
(Settings).
to perform a one-shot auto-
for
34