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Page 74 OmniTek XR User Guide, Software Release 2.3
At the bottom of the Generator window is a simple status display that displays the total
memory available to store images, plus the amount that is used, along with a bar that
gives a graphical indication of how much memory is used.
The numbers used are calibrated in frames, and hence will change depending on the
current video standard.
If the Advanced module is present, two sets of numbers are used, separated by a ‘slash’.
The number before the slash is the number of frames if the frames are video only, and
the number after the slash is the number if the frames also include all the blanking data
(as applies where the frames in the OmniTek RVF format).
Pattern Creation
Where OmniTek XR includes the Motion-Capture option, video can be generated from
‘patterns’ stored on disk. These may be frames or sequences.
Frame-based patterns
These patterns are stored as individual frames, so a picture captured with a digital
camera, or an image generated in a graphics application could be used.
The images can be in a variety of standard image formats (jpg, jpeg, gif, yuv, yuv10, bmp,
dpx and cineon).
Importing Frame patterns
Clicking on the Import icon on the toolbar or selecting Import Image from the Source
menu brings up the file selector dialogue. Simply navigate to find files in one of the
acceptable formats, and open the required file. The image will then be imported into the
display window and loaded.
Sequences (Motion-Capture option only)
The sequences of frame patterns considered here are intended to be sequences of
adjacent frames captured from a video source.
Once a sequence has been loaded, it can be replayed forwards or backwards, in real
time or faster or slower, in a loop. It is also possible to step through the clip frame by
frame. Depending on the video standard, it is possible to play up to about 40 seconds of
standard definition video.
Please note that the Generator window is a frame-based tool. This means that field-
based formats may sometimes give incorrect results. For example, if you play a field-
based sequence forwards, it will play correctly. However, if you try to play it backwards,
the field sequence will not change, so the fields will play in the wrong order. Similarly
image resizing is done on a frame basis. Hence if the images in a sequence consist of
field images, and the sequence is resized on loading, the result may not be exactly as
expected.
Importing Sequences
Two main sequence types may be loaded. The more usual choice is to load an .avi file.
Note, however, that .avi files can only be loaded if the relevant AVI codec is installed in
the Windows operating system. Codecs for common AVI file formats are included in the
standard Microsoft Windows installation.
It is also possible to load a sequence consisting of individual frames, as detailed below.
Importing a sequence of frames is fundamentally the same operation as importing a
single frame so the procedure is (again) to either click the Import icon on the toolbar or
select Import Image from the Source menu. However, instead of selecting a single frame
from the file selector, you select multiple frames (for example by using the Shift-click
technique). Click OK and the sequence will load into memory.