Decimation (Color Cameras) - Photon Focus MV1-D3360-160-CL Series User Manual

5.1.4 Decimation (color cameras)

Decimation reduces the number of pixels in y-direction by skipping rows. Decimation in color
cameras is slightly different from the monochrome cameras, because the order of the Bayer
pattern must be maintained.
Beginning from the first row, always two rows are read out and then an even number of rows
is skipped. The red rows in Fig. 5.10 are read out and the total number of rows is the sum of
the red rows.
The number of skipped rows for decimation d are: H
The resulting number or rows for Window.H=h: h
The total number of rows can be read by the property Window.HInterface.
Table 5.2: Values of H
skip
Table 5.3: Examples of total rows in color decimation
, e c i m a t i o n = 2
Figure 5.10: Example of decimation in color cameras
5.1 Reduction of Image Size
Decimation
2
3
4
5
as a function of decimation
Window.H , d=2
h
tot
640 320
1024 512
1088 544
2048 1024
H
s k i p
= (d 1) ∗ 2
skip
= 2 ∗ floor (h/d) + min(h mod (2 ∗ d), 2)
tot
H
skip
2
4
6
8
, d=3 Hh , d=4
h
tot tot
214 160
342 256
364 272
684 512
D e c i m a t i o n = 3
= 2
H = 4
s k i p
33