User`s manual

Standard Features AW00089316000
274 Basler ace GigE
Decimation’s Effect on AOI Settings
If vertical decimation is activated, the camera
automatically adapts the AOI settings to the modified
image size based on the formulas below.
For evaluating the new AOI height, the camera takes
into account the number of physical lines that are
between the first transmitted line (L1) and the last
transmitted line (Ln), i.e. the so-called covered lines
(see Figure 106). The line Ln + 1 in our example would
not be part of the covered lines when the decimation
feature is activated.
Calculating the covered lines (C)
 For mono cameras:
(C) = H_old x D_old - D_old + 1
 For color cameras:
(C) = H_old x D_old - 2 x D_old +2
The following examples show how the modification of the vertical decimation value influences the
automatically calculated new AOI height:
As soon as the covered lines are determined, the camera
calculates the new AOI height:
 For mono cameras:
New AOI height = Round up (C / D_new)
C = Coverage
D_new = New decimation value
D_old = Old decimation value
H_new = New AOI height
H_old = Old AOI height
 For color cameras:
New AOI height = 2 x Round up ((C / 2) / D_new)
Vertical decimation
set ...
acA2000-50gm
[Original AOI height =1088]
acA2040-25gc
[Original AOI height =2046]
from 1 Covered lines: 1088
AOI height: 1088
Covered lines: 2046
AOI height: 2046
to 10 Covered lines: 1088
New AOI height: 109
Covered lines: 2042
New AOI height: 206
to 1 again Covered lines: 1081
New AOI height (*): 1081
Covered lines: 2042
New AOI height (*): 2042
to 7 Covered lines: 1081
New AOI height: 155
Covered lines: 2042
New AOI height: 292
to 1 again Covered lines: 1079
New AOI height (*): 1079
Covered lines: 2032
New AOI height (*): 2032
 The values in this table are calculated based on the formulas explained above.
 (*) = See note on "AOI height can be reset to maximum" below.
Table 25: Vertical Decimation and AOI Heights (Sample Calculations)
Fig. 106: Covered Lines (Mono Camera)
L1
Ln