ACTi GNR-3000 User Manual download pdf (Page 87)

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GNR-3000 System Administrator’s Manual

4. After a tour is saved, it is available on Live View pagePTZ control panel.

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 place 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 (e.g. ACTi KCM-3911,

KCM-7911)

 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 (e.g. ACTi E96).

NVR 3.0 makes it possible to integrate both kinds of fisheye cameras into your system with the

following advantages:

Note

The preset points and tour set in NVR 3.0 are independent from those you set on device. If you

have already defined certain preset points or tour on device, they will not be brought to NVR

system. On the other hand, the settings on NVR 3.0 will not write to the devices.

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ACTi GNR-3000 User Manual Page 87