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RMV Operations Manual Revision Copyright illunis LLC, 2014
Page 88
6.1: Image Detectors
Brightness Detector
Brightness
detector measure the brightness of
the image within the auto exposure detector (AED) window.
The AED sums the values of the image data within the win-
dow. The top 15 bits of the summed data is output as the
AED data. The MSb of the AED is a negative logic flag
indicating that the data is valid. Thus if the highest bit
(0x8000) of the AED is set then the AED value is INVALID.
To change the AED position you must use the PIO twin
command write, this requires writing the data first and then
the address for the data second.
Serial Commands
Target
Index
Command
R/W Description
04
1d
Auto Exposure Detector
(Counter)
W
0x0003 = Enable small AED window
0x0004 = Enable large AED window
04
19
Show Detectors
W
0x0002 = AE Window
0x0009 = disable
04
1a
Read Detectors
R
0x0002 = AE Window
03
03
0c
13
AE Detector Data
Top Register Address
R/W Location in units of 16 lines
0x003d = Set AE Top location
03
03
0c
13
AE Detector data
Right Register Address
R/W Location in units of 16 pixels
0x003e = Set AE Right location
03
03
0c
13
AE Detector data
Left Register Address
R/W Location in units of 16 pixels
0x003c = Set AE Left location
03
03
0c
13
AE Detector data
Bottom Register Address
R/W Location in units of 16 lines
0x003F = Set AE Bottom location
Quick FAQ’s:
►Brightness is also called AED
►The AED window size is programmable.
►The small AED was designed to use a window size
of 1M pixel, thus a window of 1k x 1k pixels is
standard.
►The large AED window can measure up to 16Mpix,
►If the high bit of the AED is set then the data is not
vaild. Data can become invalid during a ASYNC
RESET mode and a triggered image .
►The AED window can be displayed as an overlay.
AED Window
TOP
BOTTOM
LEFT
RIGHT