ALLIED Vision Technologies Guppy F-503 - Manual (Page 156)

Description of the data path
GUPPY Technical Manual V7.1.0
156
Single knee point vs. two knee points
Single knee point operation means: Only one knee point can be controlled.
The following diagram (left) shows the situation for a single knee saturation
control in auto knee-adjust mode.
Two knee point operation means: Two knee points can be controlled. The
following diagram (on the right) shows the situation for a two knee point
control in auto knee-adjust mode.
Figure 93: Single knee situation (left) and two knee point situation (right)
Note

The auto knee-adjust mode tries to keep the total shutter
width to the maximum 480 rows in order to achieve the high-
est dynamic range.
Storage control
Saturation control
Shutter Width 1
V1
V2
V4
Total Shutter Width
Final saturation
level set by V2
Saturation level
set by V1
level set by V2
Integration time
Sen
sor o
u
tput
Lo
w
ill
um
ina
tio
n
H
ig
h
ill
um
in
at
io
n
Storage control
Saturation control
Shutter Width 1
V1
V2
V4
Total Shutter Width
Final saturation
Saturation level
set by V1
level set by V3
Integration time
Sen
sor o
u
tput
Lo
w
illu
mi
na
tio
n
H
ig
h
ill
um
in
at
io
n
Saturation level
set by V2
V3
Shutter Width 2
Frame Valid Frame Valid
Vertical Blanking
interval
Vertical Blanking
interval