User manual

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Correction Of Lens Distortion (L22 Only)
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Since activated lens distortion correction requires additional processing power, you should
consider disabling it in situations where it is not really necessary. You will only notice a
minimal distortion of the image, especially if you use the zoom. However, the maximum
frames rate for high resolution may be reduced, which means you have to choose between
maximum distortion correction or maximum frame rate.
We recommend activating lens distortion correction, especially for applications with a low
frame rate and non-zoomed images (e.g. when using the D24M as a webcam). However,
images can usually be corrected at a later point in time when searching recorded images.
This saves on processing power during recording and increases the frame rate. The more
you zoom in on the image, the less distorted the image should appear.
Activate/Deactivate Lens Distortion Correction In The Browser
To activate this option, first specify the lens you are using in the Admin Menu > Camera
Administration > Lens Configuration dialog (this setting is saved until the camera is reset
to its default configuration). Select "L22 (4.0 mm)" option from the "Lens Type Selection"
field and then click "Apply" followed by "Restart".
Now select the "Lens Distortion Correction" option in the "Display Mode" Quick Control
panel. An automatically corrected (live) image is displayed that can be panned, tilted
or zoomed. Switching to the "Full Image" option will deactivate the automatic distortion
correction function.
Corrected image (zoom)
Zoom without distortion correction