Basic Functions; Vertical Binning (Cm-140Ge Only); Cb-140Ge Bayer Mosaic Filter - IAI cm-140ge User Manual

CM-140GE / -RA/-UV / CB-140GE / -RA

8.3. Basic functions

The CM-140GE/CM-140GE-RA, CB-140GE/CB-140GE-RA and CM-140GE-UV cameras are progressive
scan cameras with 10 or 8-bit video output in Gigabit Ethernet. An analogue iris video signal (DIP
switch select) can be used for controlling auto-iris lenses. The camera has 1/2, 1/4 or 1/8 partial
scanning for faster frame rates. Vertical binning is also available.
The camera can operate in continuous mode as well as in 4 triggered modes:
- Edge Pre-Select (EPS)
- Pulse Width Control (PWC)
- Reset continuous (RCT)
- Sequential trigger (EPS)
- Delayed readout (EPS and PWC)
Depending on the timing of the trigger input in relationship to FVAL (camera internal Frame Valid
clock), the start of exposure can be immediate (no-delay, LVAL asynchronous) or delayed until
next LVAL (LVAL synchronous).
In the following section these functions are described in detail.

8.3.1 Vertical binning (CM-140GE only).

The binning functions can be used to achieve higher frame rate or higher sensitivity. The
drawback is lower resolution.
Vertical binning is done by adding the charge from
pixels in adjacent lines in the horizontal CCD register.
Fig. 13 shows the binning principle. Resolution and
frame rate for all combinations are shown in the
below table.
The CM-140GE/-RA/-UV has 2:1 Vertical Binning:
Setting Value for Register address 0xA084
Off (no binning)
2:1 binning

8.3.2 CB-140GE Bayer mosaic filter

CB-140GE/-RA is a color camera based on a CCD sensor
with a Bayer RGB color mosaic. The color image
reconstruction is done in the host PC.
The Color sequence in the video signal is the same for
all scanning formats.
The line readout follows LVAL.
The first valid pixel is the same timing as DVAL.
The Bayer color sequence starts with:
GBG for even line numbers
RGR for odd line numbers
Figure 14 shows the timing sequence for the Bayer
mosaic read-out for the available partial scan modes.
Fig.14. Bayer layout for each scanning
0x01
0x02
- 30 -
H H
No V binning No V binning
V binning V binning
F
ig.13. CM-140GE binning.
Resolution (pixels)
1392(h) x 1040(v)
1392(h) x 520(v)
FVAL Timing
Line # from FVAL raising edge
1
9 1
15 85
20 125
27 187
31 217
LVAL
DVAL
Xsg1 Xsg1
Video out Video out
Frame rate(fps)
31.08 (UV:16.14)
48.86 (UV:25.37).
Actual V Line #
R G R
Full
G B G
R G R
2/3 Partial
G B G
G B R G G R
G B R R G 1/2 Partial
R G R
1/4 Partial
G B G
R G R
1/8 Partial
G B G
1
2ck