3D Calibration - Barco XPR-600 User Manual

Barco Media Server XPR-Series User Guide
8.3.4

3D calibration

Reverse mapping
Reverse Mapping is the preferred mapping tool when projecting onto a surface that is
not flat. This mapping tool requires you to have an accurate 3D model of the projection
surface onto which you are projecting.
The Reverse Mapping tool adjusts the position of projected material by moving arbitrary
3D points in the view. These 3D points should be placed correctly on the real model,
which allows the Reverse Mapping tool to deduce the real position of the projector and
create the proper projected image. Automatic blending is also calculated based on reverse
mapping of multiple projectors.
Reverse mapping workflow
1. Click Target Creation Mode, in the Setup section of the projector's
properties, and place a target on the geometry by left clicking in the
Viewport.
(You can also use Ctrl-click.)
Targets should be strategically spread across key vertices of the geo-
metry - usually corners and other prominent features.
2. Left-click to place the real position of the target, shown by a green cross,
at the correct position on the real physical model.
3. Use arrow keys to position more accurately the real position of the
target.
4. Press enter to validate, once the position is properly set.
5. Repeat steps 1 through 4 until at least six targets have been positioned.
6. Check Enable to calculate the real position of the projector and to adjust
its output to match the targets.
7. If needed—move the targets until the projected image of the projector
matches as closely as possible the geometry upon which it is being
projected.
This may take many passes to perfect. Selecting a target on the geometry
is done by clicking it. Selected targets are shown as red, unselected
ones are shown as blue.
8. If needed—add more targets to fine-tune the calibration.
200
Note
Do not use the Reverse Mapping tool when using the Warping tool to do a
full-screen keystone.
Section 8: Features
Barco Pn: 60600325