FOV switchover and electronic zoom in
x and 8x by changing its FOV and carrying out
1x after starting up. Press “Z” , it will be changed to 2x, press “Z”
Z=1
，
WFOV
Fig. 7-1
Fig 7-1
3.
Image zoom can be switched between 1x, 2x, 4
electronic zoom. FOV switchover and electronic zoom both are used for deflating or magnifying
the image. Nevertheless, 1x and 4x are realized by changing multiplying factor through built-in
two sets of IR optical lenses. 2x and 8x are done by electronic zoom. Fig.7-2 shows images with
different multiplying factors.
Its original multiplying factor is
again to get 4x zoom, and then 8x zoom in. It will change to 1x if pressing “Z’ for the fourth time.
So, it is a circulatory process.
Z=2
（
WFOV & 2× electronic zoom
）
Brightness
Contrast
Polarity
ode
Camera M
Zoom
16
