Video: Panorama Projection with Calibrator Lite

Steps

Two projectors covering one flat wall, aligned and blended by camera. Nothing is measured by hand and no warping is done manually — the whole job takes about four minutes.

The camera here is permanently installed. It could equally sit on the technician's laptop for the duration of the commissioning.

1. Create the projection

In the Scene View, right-click and choose Add scene object → Projection Setup Wizard, then Panorama for a flat screen. Set Projector Count to 2 and click Create.

Backstage creates the surface and both projectors in one setup group, already aimed at the screen. Because they share a group, each projector already covers the surface — there is nothing to assign.

2. Route the projectors to outputs

Open Video Routing and connect each projector to the GPU output it is physically cabled to. Projectors are rows, outputs are columns. Until this is done the scene is correct and the wall stays dark.

3. Add Calibrator Lite

In Scene Objects, right-click the group holding the surface and add a CalibratorLite node. Double-click it to open the Camera Calibration window, then pick the screen from the Surface dropdown.

4. Focus the camera

On a new installation the camera is often not focused yet. Press Focus — the projectors display a line pattern and the camera takes a test shot. Zoom into it with Ctrl + wheel to check the lines are crisp; blurred lines mean the solver works from soft edges, and the result inherits that.

5. Take the reference photo

Start the calibration. The projectors show a grey image and the camera takes a reference photo. Two things are checked on it before going further.

Camera orientation. If the photo is upside down or sideways, rotate it — in this setup the projectors are ceiling-mounted, so it needs rotating. Then the white-detection tool finds the bright projected area in the photo.

6. Place the corner markers

Drag the four markers onto the corners you want the projection to have. Zoom in with Ctrl + wheel while placing them — precision here is what the whole calibration is built on.

7. Run the calibration

With the markers placed, start the calibration proper. The projectors show stripe patterns, the camera photographs each in turn, and the solver computes projector frustums and warp meshes from the correspondences. This runs at its own pace — a few minutes for two projectors, shown here in real time rather than sped up. Leave the room undisturbed while it works.

8. Accept the measured screen

At the end the calibrator has measured the real screen and compares its aspect ratio against the surface in the scene — which, following step 1, was never given real dimensions. It offers to correct the scene to match what it measured.

Accept it. That is the mechanism that lets you skip the measuring at the start: the camera does it, and the scene is corrected to reality afterwards.

9. Check the result

A confirmation photo of the calibrated projection is captured. Pan and zoom around it — the geometry should run continuously straight across the seam between the two projectors.

Then toggle Blending on and off. With it off you see two overlapping images and the bright band where they cross; with it on the join disappears.

What this build depends on