Analog
video units produce an analog video output signal and transmit it
to a frame
grabber board in the PC.
Interlaced
analog video signals conform to either
the EIA
standard (30/60Hz, frame/field) or the CCIR standard
(25/50Hz,
frame/field).
Image
Frequency
|
Parameter
|
CCIR
|
EIA
|
Frames
Full Res. Hz
|
25
|
30
|
Field
1/2 vertical Res.
|
50
|
60
|
Reduced Res.
|
na
|
na
|
| Output Norm |
Parameter
|
CCIR |
EIA |
Resolution
|
752
x 582
|
784
x 494
|
Pixel Size µm
(hor. x vert.)
|
8.6
x 8.3
|
8.4
x 9.8
|
|
|
The
dynamic range of analog video units cover up to 14bits depending on
the frame grabber board and the operation mode of the unit. The full
dynamic range is utilized by a manually or automatically adjustable
video gain.
Independent of the resolution of the used hardware, our Dynamic Range
Expansion system
allows for a resolution enhancement up to 32bit after the
A/D conversion. Please keep
in mind that, in principle, the half of your bits is resolving the shot
noise of the incoming light, as explained in the shot noise section.
|
