RMV Operations Manual Revision Copyright illunis LLC, 2014
Page 93
6.5: Image Detectors
Raster Detectors
Raster
detectors (RD) are used to measure the
size of the video image output by the RMV camera link
signals. The RD’s count the number of pixels per line
and the number of active pixels per line. The RD’s also
count the number of lines per frame and the number of
active lines per frame. Because the RMV can be set to
any number of modes the RD circuit is vital to correctly
configuring your capture device.
Serial Commands
Target
Index
Command
R/W
Description
04
1b
System Registers
R
0x0000 = Read Pixels/line
0x0001 = Read Active pixels/line (in LVAL)
0x0002 = Read Lines per frame
0x0003 = Read Active lines per frame (in FVAL)
04
14
Line of Interest
R/W
Line number from top of image (Plus FVAL start)
Quick FAQ’s:
►LVAL = Line VALid: This Camera Link signal indi-
cates when pixel data is valid with a line.
►FVAL = Frame VALid: This Camera Link signal
indicates when line data is valid with a Frame.
►LVAL start and stop define a lines active pixels and
are in some weird internal FPGA counting unit.
►FVAL start and stop define a frames active lines
and are directly related to the sensor design.
►
The Raster line detectors use the “line of Inter-
est” line from the On Screen line plot function
to determine which line is measured. The line
of interest must be in the visible image data or
these detectors will read zero !
Active Area
Active Pixels Per Line
A
ct
iv
e
Line
s
P
er
Fr
am
e
Pixels Per Line
Line
s
P
er
Fr
am
e
FV
A
L
LVAL