Vinten Radamec Free-d User Manual
Page 33
Vinten Broadcast Ltd
free
-
d
™
Installation Manual V1.4.4
Page 33 of 46
The DSP status is a signed 8-bit number which when negative indicates an
error condition as follows:
-1
Too few valid targets visible to compute camera position.
-2
Iteration failed to converge.
-3
A DSP reset occurred.
-4
Internal DSP error.
A zero or positive value of DSP status indicates the number of iterations which
were required to compute the camera's position.
A.3.4 Type D3 - control parameters
The D3 message is used for transferring the control parameters. It may be
sent to the
free-d™
unit in order to set their values, or requested from the
free-d™
unit in order to interrogate the current values. Operation of switch S4 saves
the current values to EEPROM, which become the default values following a
subsequent processor reset.
The message contains 13 bytes as follows:
<D3>
Message type
<CA>
Camera ID
<SN>
Studio ID
<SM>
Smoothing value
<HI>
Maximum asymmetry
<HO>
Half box width
<BT>
Black video threshold
<WT>
White video threshold
<BC>
Black video clip level
<WC>
White video clip level
<MB>
Maximum number of >black pixels between boxes
<MW>
Minimum number of >white pixels in inner box
<CK>
Checksum
The ‘studio ID’ is in the range 0 to 255 and determines which database of
target positions (stored in the on-board EEPROM) is used.
The ‘smoothing value’ is in the range 0 to 255, corresponding to settings of
smoothing between 0.000 and 0.996.
The ‘maximum asymmetry’ is in the range 0 to 255, in units of 1/128 pixels.
This sets a limit on the difference between the centre position of a target as
measured by the hardware and its position as estimated as the mid-point
between opposite edges.