Vinten Radamec Free-d - Manual (Page 13)

Vinten Broadcast Ltd free - d ™ Installation Manual V1.4.4
Page 13 of 46
6 Calibration procedure
Before proceeding, ensure that all required targets have been mounted in the
studio ceiling and the identification number of each target number noted onto
the map (see Appendix G). If no target map is available, it will have to be
reconstructed by directing the Free-d camera at the target array, and reading
the target ID numbers from a monitor connected to the monitor output of the
processor.
Select a suitable studio reference point. This reference (or zero) is typically
the bottom left target on the target map (Row1, Column 1). In actuality the
reference point can be any permanent reference in the studio. If there is a 3D
virtual set system already in operation in the studio then it may be more
convenient to use the same reference as the VR set.
Measure three targets with respect to the reference. It is essential that these
targets be measured to the best accuracy possible, as the results have a huge
effect on the subsequent calibration. It is necessary to measure x, y, and
height of two targets (A and B) and height only of a third target (C). The
distance between targets A and B should be greater than 50% of the entire
target array in the x-axis. This determines a baseline from which all other
targets are measured. The distance from target C to the baseline should be
greater than 50% of the entire length of the y-axis. If these rules are not
adhered to, the Calibration Wizard will not proceed and the program will
display a warning. The measured targets do not have to be on different rows
or columns, and they do not have to be at different heights.
Note these measurements together with their ID number. These ID numbers
will be entered in the calibration program (freed_v14.exe).
A B
C
>50%
>50%
Measure:
A = x, y and height
B = x, y and height
C = height only