Photon Focus CameraLink MV1-D1280, User Manual

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Y D e c i m a t i o n = 2
W
in
do
w.
H
H
s k i p
= 2
Y D e c i m a t i o n = 3
H
s k i p
= 4
X D e c i m a t i o n = 2
W i n d o w . W
W
s k i p
= 2
X D e c i m a t i o n = 3
W
s k i p
= 4
W i n d o w . W
Figure 5.5: Example of decimation in colour cameras
and y-direction (see also Fig. 5.6).
The 2x2 binninig in the colour camera combines 2 adjacent pixels of the same colour channel -
respects the Bayer pattern - horizontally and vertically into one pixel by performing an
addition. It reduces the number of pixels by 2 in x- and y-direction (see also Fig. 5.7).
Since the same number of pixels need to be read out of the sensor matrix when binning is
activated, enabling of the binning doesn’t reduce the readout time of the image. There is
more a slight reduction of the frame rate due the slight increase of the readout delay (see also
Table 5.6).
P 1
P 3 P 2
P 4
P
b i n
Figure 5.6: 2x2 binning (monochrome cameras)
R 1
G b 1
G r 1
B 1
R 2
G b 2
G r 2
B 2
R 3
G b 3
G r 3
B 3
R 4
G b 4
G r 4
B 4
R
b i n
G b
b i n
G r
b i n
B
b i n
Figure 5.7: 2x2 binning (colour cameras)
Triggers can be lost during switching off or switching on of the binning feature
due to the internal timing calculation.
A binning of 2x2 adds to more bits to the 10bit pixel data. A binning bitshift parameter allows
an alignment of the 12bit binned pixel data. Shift values 0, 1 and 2 are supported. A value of 0
outputs bits 9 to 0 and a value of 1 outputs bits 10 to 1 of the binned data. In both cases, the
5.1 Reduction of Image Size 27