QNAP Security VioStor NVR (Version: 4.0.0) - Manual (Page 56)

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f. Dewarp panomorph images: for the specific camera models with panomorph lens
Before using this feature, you need to select the ‘Enable panomorph support’
option in the recording settings page. Right click the channel and enable the
function. After that, you can select Mount type, including wall, ceiling, and floor
and then select Dewarping mode, including Perimeter mode, Quad mode, and PTZ
mode.
Remark 1: To know the camera models which can be installed with panomorph
lens, please visit
http://www.immervision.com/en/security/security_partners/security_partners_
2.php
.
Remark 2: The function is only available when the resolution of the video stream
is higher than 640x480 on the monitoring page.
Remark 3: If Dewarping mode is PTZ mode, for the channel, you can use PTZ
control panel or mouse (by clicking and holding down the mouse left button, and
then moving the mouse or turning the mouse wheel) to change viewing angles or
zooming in/out the screen. If Dewarping mode is Quad mode, the above
methods can also be applied to operate PTZ functions in each divided screen.