System and method for mechanically adjusting projector pose with six degrees of freedom for image alignment
AssigneeMitsubishi Electric Research Laboratories, Inc.
InventorsRamesh Raskar, Jeroen van Baar
Life of this patent
Estimating the term…
Abstract
A method adjusts a pose of a projector with respect to a display surface. A homography HD,P is determined between a display surface and a projector. The homography HD,P is decomposed into rotation and translation parameters expressing a pose MP of the projector. An ideal pose M0 of the projector corresponding to an ideal homography H0 is determined. A pose adjustment MA is determined according to MA=M0(MP)−1. The pose adjustment MA is decomposed into rotation and translation adjustment parameters. Then, the projector is adjusted mechanically to the ideal pose M0 according to the rotation and translation adjustment parameters.
Claims14
A computer implemented method for adjusting a pose of a projector with respect of a display surface, comprising:
- determining a homography HD,P between a display surface and a projector;
- decomposing the homography HD,P into rotation and translation parameters expressing a pose MP of the projector;
- determining an ideal pose M0 of the projector corresponding to an ideal homography H0;
- determining a pose adjustment MA according to MA=M0(MP)−1;
- decomposing the pose adjustment MA into rotation and translation adjustment parameters;
- and
- adjusting mechanically the projector to the ideal pose M0 according to the rotation and translation adjustment parameters.
An apparatus for a pose of a projector with respect of a display surface, comprising:
- a six degree of freedom platform including motorized joints;
- a projector mounted on the six degree of freedom platform;
- a display surface;
- means for determining a homography HD,P between the display surface and the projector;
- means for decomposing the homography HD,P into rotation and translation parameters expressing a pose MP of the projector;
- means for determining an ideal pose M0 of the projector corresponding to an ideal homography H0;
- means for determining a pose adjustment MA according to MA=M0(MP)−1;
- means for decomposing the pose adjustment MA into rotation and translation adjustment parameters;
- and
- means for providing the rotation and translation adjustment parameters to the motors to adjust the projector to the ideal pose M0.
Dependencies are inferred from the claim text.