Abstract: Method for automatically restoring a calibrated state of a projection system, allowing simple and error-free alignment of a projection system in an original error-free state of the system. A calibrated state of a projection system is automatically restored by calculating a position and orientation of at least one camera within the projection system, using fixed points, subsequently m times n markers (9?) are projected onto the projection area, using the markers by cameras to determine a reduced number, compared with the calibration, of second measurement points (QI?) that have one X, Y and Z coordinate each, the reduced number of second measurement points (QI?) is used to perform a calculation of the differences between the second measurement points (QI?) and the associated first measurement points (QI?), a displacement vector is formed, the association between the projector coordinates and 3D coordinates is adapted with the displacement vector.

Abstract: A method for automatically producing an optical blend mask arranged in a beam path (8) of a projector (2) in a projection system with two projectors (2), by determining an actual state of the projection system by calibrating and producing an ideal blending, ascertaining an individual distortion of the projector (2) by using a front or back projection surface (11), introduced into the beam path (8), using patterns (13) from which points are derived, ascertaining the alignment and the position of the front or back projection surface (11) within a blend mask plane, calculating the optical blending for a partial image, for positioning and/or a transformation of the ideal blending, adapting the ideal blending for compensating a soft focus, applying the ascertained, individual distortion of the projector (2) to the blending, ascertaining data of the optical blend mask and outputting data for producing the optical blend mask.