20
GVI Security
3.3.7
Setup Menu 1
The SETUP MENU 1 is shown below.
The zoom speed of the PTZ Dome Camera is fixed (Value: 8). Users could choose whether to activate
functions including Digital Zoom, Slow Shutter, Noise Reduction, Image Inverse and Image Freeze.
Refer to the following description for use of each function.
DIGITAL ZOOM
With this item, users can enable or disable the 12× Digital Zoom. The Digital Zoom will start
to activate after the full Optical Zoom level is reached. Maximum 12× digital zoom function is
allowed to be enabled. The default setting is <ON>.
NOTE:
The difference between optical and digital zoom is that optical zoom uses the lens
within the camera to draw the image closer via zoom in or out to achieve the desired effect.
Optical zoom remains the same resolution of the zoomed image quality. On the other hand,
Digital zoom takes a portion of image and expands that image to the full size of the image; the
image quality will be reduced.
SLOW SHUTTER
The shutter speed determines how long the image sensor is exposed to light. The Dome
Camera will automatically adjust the shutter speed basing on the light condition of the
operating environment. With Slow Shutter function, users can see clear image in low light
conditions under 0.1 Lux.
DIGITAL NOISE REDUCTION (D.N.R.)
With 2D / 3D Noise Reduction, the processor analyzes pixel by pixel and frame by frame to
eliminate environmental noise signal so that the highest quality image can be produced even in
low light conditions. In comparison with 2D D.N.R., 3D D.N.R generates better video with
reduced digital noise levels.
IMAGE INVERSE
Users can select <ON> to make the displayed image inversed vertically and horizontally (see
the figures shown below). Occasions to employ the function include conferences,
demonstration, testing, etc. The default setting is <OFF>. When this function is enabled, the
preset mask(s) will be set off automatically.
Application:
Users can see the displayed images, as shown below, when a dome is placed on
the desk top in a conference, for instance.
