Vinten Radamec Free-d - Manual (Page 14)

Vinten Broadcast Ltd free - d ™ Installation Manual V1.4.4
Page 14 of 46
6.1 Constructing a target database
Once operational, the system must know the exact position of every target to
an accuracy of less than 1mm. To measure every single target to this level of
accuracy, while not impossible, would be difficult and time consuming. The
calibration process is able to refine the target positions provided an initial
accuracy of 100 mm is achieved.
Provided the precise position of the three measured targets is determined, the
system will refine the position of all the others.
Run the program makedef.exe. This creates a text file containing x,y,z values
based on the installed grid pattern. When prompted input the x, y spacing and
number of targets for each direction, height of upper and lower targets, min x
and y values from origin (an offset of x, y, normally 0.0 for each) and the
pattern of high and low targets used.
The pattern is defined by a hex word. The whole pattern can be calculated by
knowing the configuration of the first block of 16 targets (4x4) situated in the
bottom right-hand corner of the target map.
Row 4 Low = 0 Low = 0 High = 1 High = 1 = 3 in Hex
Row 3 High = 1 Low = 0 Low = 0 High = 1 = 9 in Hex
Row 2 Low = 0 Low = 0 High = 1 High = 1 = 3 in Hex
Row 1 Low = 0 High = 1 High = 1 Low = 0 = 6 in Hex
Col 1 Col 2 Col 3 Col 4 Byte Word = 6393
To view and check the pattern byte word, run the program seepatt.exe and
enter the pattern to be used in hex (in this case 6393).
Blue = Low , Red =
High .
Use the cursor keys to simulate tilt and roll of the camera to see the extent of
low targets obscuring high targets.
Target pattern hex “6393” Tilt/roll simulation
This portion
should match
the 16 target
block above.