Auto Exposure Control - Imi Tech PEARL IMB-20FT User's Operation Manual

PEARL SERIES Operation Manual
4.2.

Auto Exposure Control

The automatic shutter/gain mode is based on a feedback loop which calculates the average pixel luminance. Then
the average is compared with the exposure reference value, adjusting shutter and gain accordingly. This feature is
similar to "Contrast Control".
Inquiry Register
Address Name
504h AUTO_EXP
OSURE_INQ
Status Control Register
Address Name
804h AUTO_EXP
OSURE
P i o n e e r i n D i g i t a l V i s i o n T e c h n o l o g y
Abs_Control [1]
- [2..4]
One_Push [5]
On/OFF [6]
A_M_Mode [7]
- [8..19]
Value [20..31]
Field Bit
Presence_Inq [0]
Abs_Control_Inq [1]
- [2]
One_Push_Inq [3]
ReadOut_Inq [4]
On/Off_Inq [5]
Auto_Inq [6]
Manual_Inq [7]
Min_Value [8..19]
Max_Value [20..31]
Field Bit
Presence_Inq [0]
Abs_Control [1]
- [2..4]
One_Push [5]
0:N/A 1:Available
Absolute value control
0: Control with value in Value field
1: Control with value in Absolute value
CSR if this bit =1, value in Value filed is ignored
Reserved
Write '1': begin to work(Self cleared after operation)
Read : Value='1' in operation
Value ='0' not in operation
If A_M_Mode=1, this bit is ignored
Write : ON or OFF this feature
Read : read a status
0: OFF, 1: ON
If this bit=0, other fields will be read only.
Write : Set the mode
Read : Read a current mode
0: Manual, 1: Auto
Reserved
Minimum value for this feature control
Description
Presence of this feature
Capability of control with absolute value
Reserved
One push auto mode(Controlled automatically by
camera only once)
Capability of reading the value of this feature
Capability of switching this feature On and OFF
Auto mode (Controlled automatically by camera)
Manual mode(Controlled by user)
Minimum value for this feature control
Maximum value for this feature control
Description
Presence of this feature
0: N/A 1: Available
Absolute value control
0: Control with value in the Value field
1: Control with value in the Absolute value CSR
If this bit = 1, value in the Value field is ignored.
Reserved
Write '1' : begin to work (Self cleared after
operation)
Read : Value='1' in operation Value='0' not in
operation
If A_M_Mode =1, this bit is ignored
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