Network Video Recorder Administrator’s Manual
111
Configure Fisheye Cameras
With hemispherical lenses, fisheye cameras generate images at up to 360-degree width,
which can cover all four corners of a room or both sides of a long aisle. As the original image
captured by wide-angle lens is much distorted, to suit most monitoring purposes, the
Dewarping
process is required to alter the uneven lines and shapes before the images are
displayed. Nowadays, the fisheye cameras come in two types in terms of the
image-correction capability:
Fisheye Cameras
with
in-camera dewarping function
The dewarping takes places in camera before the video is output to NVR server. Since the
image correction counts on the camera itself, NVR server will not bear much extra loading,
which benefits the system requiring many of these fisheye cameras .
Fisheye Cameras
without
dewarping function
These fisheye cameras output only original global images, relying on software algorithm
processing provided by NVR sever to correct the images. They are suitable for a system
with limited bandwidth, for NVR server processes and responds to User’s ePTZ
manipulation or demands for changing view modes immediately, without waiting for camera
side to deliver a new frame.
NVR
’s software algorithm can perfectly corrects the original fisheye images, generating
6
specific fisheye view modes
from User’s usual perspective. As a remote client, you may
Select a desired fisheye view mode on Live screen and manipulate virtualized ePTZ
operation with onscreen controls.
Export the video clip of your desired fisheye view mode.
To make use of NVR
’s dewarping features for your fisheye cameras, please
1.
Adjust
Video Quality Settings
After the fisheye camera is successfully added, go to
Setup
page
Cameras
tab, select the
device and then
click “
Get Camera Settings
”, make sure you set the
Stream Mode
as
“
FISHEYE
” for a hemispheric camera .This is to make sure this hemispheric camera is
outputting fisheye original video stream as a mini fisheye dome camera does.
2.
Adjust
Fisheye Display Settings
Select your
Mounting Type
, and then
Default Fisheye Mode
. For a fisheye mode containing
panorama view, you may want to configure the
Default Rotate X
(width of view) and
Default
Rotate Y
(height of view) configurations.
