User Manual
Wildcat
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This document is the property of Xenics. It may not be reproduced
–
completely or partially
–
or passed to a third
party without written permission from Xenics.
Xenics nv
T +32 16 38 99 00
Doc Ref: ENG-2020-UMN001
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Issue: R001
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www.xenics.com
Date:
XF-104_03/20-12-2012
Page 44 of 58
The first step corrects for Fixed Pattern Noise (FPN) which is caused by differences in
individual pixel offset. It requires a uniform dark image. This may be achieved by simply
placing the camera front on a non-IR-emitting surface, completely covering the sensor. The
current scene may be observed in the X-View pane, which will aid in this wizard.
The
Bad pixel criteria
section allows you to specify when pixels are marked as bad and thus
are replaced in the corrected image. We recommend using a bad pixel threshold of 350% for
both the
Fixed pattern noise
and
Temporal noise
settings for a Wildcat camera.
Additional options exist for creating a TrueNUC calibration. For more details on this, please
refer to the Xeneth User Manual in the Xeneth installation folder.
Press the
Perform capture and analysis
button (
1
) to proceed. The wizard will now grab the
required frames with the camera and apply its correction algorithms. Some basic bad pixel
info will be displayed under
Results
– Info
, and the bad pixels will be marked in the X-View
pane
.
Each bad pixel criterion has its own color code.
In
Statistics
you can see the currently selected exposure time in
Integration time
and, after
the capture and analysis phase, the current average scene response in
Current scene
intensity
and the spatial variance of the scene in
Scene variance
.
It is recommended to use
a scene with a response and spatial variance as low as possible.
There will always be
a certain amount of inherent response depending on the integration time due to the dark
current, and a certain inherent spatial variance due to the FPN.
Select N
ext >
to proceed to the next step.
