QUICKCAL REF1 SOFTWARE

The calibration process uses as main inputs: Indeed, it helps to think of the calibration as a process that works on a volume in space, rather than on 2-dimensional surfaces. This means that the matrix does not need to be absolutely physically correct, but should be correct for at least this projection area (or rather volume). The calibration goal is to calculate a projector's projection matrix so that it produces physically valid projections on its assigned projection surfaces in the real world (the scene). Then move on to creating reference points, and then line them up. You don't have to be particularly accurate in this, but when you're trying to select projectors in the visualiser for editing, it's easier when they're in roughly the right place. To start using QuickCal, first move the virtual projector into roughly the right position and orientation, and set up its lens qualities to roughly match the real projector.

For building projections we recommend a mesh with a +-5mm error margin. The reason for this is that disguise's calibration algorithm assumes that the virtual reference points link exactly to their corresponding real-world points. The best way to generate a highly accurate 3D model is to laser scan the physical model, or to laser cut the physical model based on the same 3D file you later use in the disguise software. When calibrating projectors using QuickCal it is crucial that the 3D mesh object is modelled accurately to the physical model.

QUICKCAL REF1 SOFTWARE

Once you've done enough points (about 10-15 per projector) the disguise software can work out exactly where the projector is, and what lens qualities it has. The basic process of QuickCal is relatively simple : drop reference points onto the 3D model of the projection surface, and then 'line up' by dragging each point in the projector's output raster until it hits the corresponding point on the real surface. As long as the 3D meshes are good matches to the real-world projection surfaces, QuickCal can accurately calculate the projector parameters. QuickCal is based on reference points on given 3D meshes for a projector's target surfaces, and user-defined 2D image coordinates that are manually assigned to these 3D reference points. QuickCal is a user-driven process of calibrating a virtual projector's position, orientation and lens properties to match the real-world projector.

Quickcal ref1