ALLIED Vision Technologies Stingray F-504 - Manual (Page 317)

Configuration of the camera
STINGRAY Technical Manual V4.4.4
315
Auto shutter control
The table below illustrates the advanced register for auto shutter control.
The purpose of this register is to limit the range within which auto shutter
operates.
When both auto shutter and auto gain are enabled, priority is given to
increasing shutter when brightness decreases. This is done to achieve the
best image quality with lowest noise.
For increasing brightness, priority is given to lowering gain first for the same
purpose.
MinValue and MaxValue limits the range the auto shutter feature is allowed
to use for the regulation process. Both values are initialized with the mini-
mum and maximum value defined in the standard SHUTTER_INQ register
(multiplied by the current active timebase).
If you change the MinValue and/or MaxValue and the new range exceeds the
range defined by the SHUTTER_INQ register, the standard SHUTTER register
will not show correct shutter values. In this case you should read the
EXTENDED_SHUTTER register for the current active shutter time.
Changing the auto shutter range might not affect the regulation, if the reg-
ulation is in a stable condition and no other condition affecting the image
brightness is changed.
Register Name Field Bit Description
0xF1000360 AUTOSHUTTER_CTRL Presence_Inq [0] Indicates presence of this
feature (read only)
--- [1..31] Reserved
0xF1000364 AUTOSHUTTER_LO --- [0..5] Reserved
MinValue [6..31] Minimum auto shutter value
lowest possible value: 10 µs
0xF1000368 AUTOSHUTTER_HI --- [0..5] Reserved
MaxValue [6..31] Maximum auto shutter value
Table 144: Advanced register: Auto shutter control
Note

• Values can only be changed within the limits of shutter
CSR.
• Changes in auto exposure register only have an effect
when auto shutter is enabled.
• Auto exposure limits are: 50..205 (SmartViewCtrl1
tab: Target grey level)