TrackMen VioTrack R+ Manuale utente
VioTrack R+
Optical camera tracking-system for virtual graphics
A product of TrackMen
U G
Version 1.1 (EN), May 2021
VioTrack R+ User Guide
TrackMen GmbH 2
© 2019 TrackMen Ltd. All rights reserved. Except as otherwise permitted
by TrackMen Ltd., this publication, or parts thereof, may not be reproduced
in any form, by any method, for any purpose.
Disclaimer
THIS PUBLICATION AND THE INFORMATION CONTAINED HEREIN
IS MADE AVAILABLE BY TRACKMEN LTD. “AS IS.” TRACKMEN LTD.
DISCLAIMS ALL WARRANTIES, EITHER EXCLICK OR IMPLIED,
INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTIES OF
MERCHANTABILITY OR SUITABILITY FOR A PARTICULAR PURPOSE
REGARDING THESE MATERIALS.
Published by:
Dillenburger Straße 97L
51105 Cologne
Germany
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VioTrack R+ User Guide
1 Table of Contents
1 Daily use 1
1.1 Switch on .....................................................................................1
1.2 User interface ...............................................................................2
1.3 Switch on error diagnostics .......................................................3
2 Real Environment 6
2.1 Reconstructions ..........................................................................6
2.2 Initialization: Create new reconstructions ...............................7
2.3 Rework: Expanding reconstructions .........................................9
2.4 Error diagnosis initialization ....................................................10
3 Maintenance 13
3.1 Mounting Slave Camera: Calculation of Oset ......................13
3.2 Master Camera Lens ..................................................................16
3.3 Data connection to the tracking workstation .........................21
3.4 Remote access ...........................................................................21
4 Advanced settings 22
4.1 Network .......................................................................................22
4.2 Conguring transmitters ..........................................................22
4.3 Delay of tracking data ...............................................................23
4.4 Coordinate system .....................................................................25
5 Appendix 26
5.1 System design ............................................................................26
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Daily use
Illustration 1-2: Master Video with wireframe cube
Illustration 1-1: Tracking with decisive points in VioTrack R
2 Daily use
2.1 Switch on 1/1
For the daily start-up of the system, please use the following steps:
1. Start master and slave cameras: the slave camera is switched on
and o via the power supply which may be provided by the master
camera.
2. Set the camera at starting position: for the best possible start,
the camera is to be placed approximately in the position where the
rst keyframes were taken.
3. Start Tracking Workstation: the system boots and automatically
starts the preset VioTrack. Three processes are then started:
3.a VioTrack Master
3.b VioTrack Master Video
3.c VioTrack R
4. The system will automatically restore the last reconstruction:
the video of the slave camera will be examined, searching for the
pattern of the last used reconstruction and the camera will locate its
position based on the detected points.
5. The system now sends the real-time tracking data to the
graphics engine: In the VioTrack R window, the known part of the
video is marked in blue because reliable points are detected there
(illustration 1-1). In the VioTrack Master video, the C key can be used
to display a wireframe cube which is on the ground at the origin
(illustration 1-2) and becomes larger and smaller when zooming
analogously to the real video.
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Daily use VioTrack R+ User Guide
2.2 User interface
VioTrack launches a specially congured
Linux client that is reduced to the essential
functions needed for operation.
The interface components are named as
follows:
1. Taskbar: displays menus, which can
be opened and processes which are
currently running. Here: VioTrack R
Master Video (minimized), VioTack
R Master (conguration window,
minimized) and VioTrack R (window
open).
2. System log: displays a real-time
log with information and any error
messages which may occur.
3. VioTrack R: the slave process of
camera tracking with an embedded
video. The master process and the
associated video are displayed in
separate open windows.
Illustration 1-3: VioTrack R User Interface with Open VioTrack R Slave Process
1.
2.
3.
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Illustration 1-5: VioTrack R Camera Settings
Illustration 1-4: VioTrack R Window without Slave Camera Video
2.3 Switch on error diagnostics 1/3
2.3.1 No image of slave camera
The Slave Camera is a network camera which must register with the
computer and the VioTrack process. The boot process may take a few
minutes.
If the camera starts after the VioTrack process or during the running
tracking process, it may not have been recognized. This can easily be
xed by restarting the image source: Illustration 1-6: Status-LED of the slave camera
2. In the VioTrack R window, click on Settings.
3. In the Settings window, click to the tab labeled Camera.
1. Make sure that the Slave camera has fully booted. Status-
LED (Illustration 1-6) illuminates either blue or green constantly
throughout.
4. Click on Restart Image Source.
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Daily use
Illustration 1-8: Load reconstruction under optimized conditions with Load Reconstruction
Illustration 1-7:Indicator of incorrect recovery: light blue image areas, as they occur only
moderately here, predominate in the image
2.3.2 Graphics are incorrect / not located at all
Check that the reconstruction could be restored plausibly. If the actual
scenery diers greatly from that in the reconstruction (changed lighting,
etc.) or the camera is far from known patterns or is panned in unknown
directions, this may result in incorrect detection of values. Please carry out
the following steps:
1. Restore the reconstructed scenery: switch to the on-air lighting
situation, switch o working lights.
2. Move the camera to the approximate starting position of the
reconstruction.
3. In the VioTrack R window, click on Load Reconstruction and select
the reconstruction you wish to apply.
If the scenery has changed permanently or the current lighting
situation should be used for an alternative, selectable show
conguration, a new reconstruction must be created and saved.
See section 3.2.
2.3 Switch on error diagnostics 2/3
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Daily use
Illustration 1-10: System Log Display with correctly attached IMU data with Dump IMU-
option enabled.
Illustration 1-9: IMU tab in VioTrack Master window
2.3 Switch on error diagnostics 3/3
2.3.3 Graphic sluggish / rushes ahead
Check that the IMU is working correctly.
1. In the event of any irregularities when switching on, it may not have
entered operating mode correctly. Check if data is available: activate
Dump IMU in the IMU tab of the VioTrack R Master window. If data is
available, number columns run through the System Log. This option
can be turned o again after checking procedure is completed.
Illustration 1-11: Cable connection of the IMU (Small case on the tracking camera)
2. If the data is unavailable, nothing is displayed in the system log. In
which case, Start the VioTrack Master Process anew by means
of (Re-)Start VioTrack R In DIAG Menu. Please check the IMU Data
again.
3. If the data still does not appear, check cable connections.
Disconnecting and reconnecting the connection could help.
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Real Environment
Illustration 1-13: Reconstruction as a point cloud. Below the already located oor as a grid.
The yellow line shows the camera movement between the keyframes.
Illustration 1-12: Slave video with intact tracking. The blue crosses show stable tracking
points.
3 Real Environment
3.1 Reconstructions
VioTrack R studies the real environment through an automatic process and
stores the resulting reconstruction in a 3D point cloud. The system will
continually examine the slave video for this known pattern and determine
the camera pose from their position towards it.
The detection works by means of corners and edges, which can be
identied clearly in the image from several perspectives. These points are
called feature points.
If the position of these points changes because the objects are moved
or illuminated dierently, they will no longer be available for tracking. If the
changes become increasingly excessive, the pattern can no longer be
reliably detected, and the recovery will fail.
Various reconstructions, for example, for dierent studios or lighting
moods, can be created and saved to be able to switch between them more
conveniently (see section 2.3.2).
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Real Environment
Illustration 1-14: Video after reset in segmenter mode (black and white) with detected
markers
3.2 Initialization: Create new reconstructions 1/2
To create a new reconstruction, VioTrack R+ uses VioTrack markers which
are installed as physical reectors or displayed on an LED display as a
xed reference. The following steps are performed:
1. Start VioTrack R+.
2. Press Reset in the VioTrack R window: the system will reinitialize:
search for the VioTrack pattern and create a new reconstruction.
Illustration 1-15: Set automatic keyframes by moving through the room. Indicators for set
keyframes light up green in the video.
3. Learn: Slowly move the camera through the entire room to be used
by the camera for broadcast.
• Several keyframes should be taken which include the VioTrack
markers (at least 4).
• Fast movements must be avoided.
• The slave camera should always see as much known reference
as possible, to be able to put new information in correct relation
(about two thirds of the image should display blue tiles).
• Only pan or tilt movements hardly provide new 3D data and are
to be combined with movement.
Indice
