System and method for calibrating a display system using manual and semi-manual techniques

A method for calibrating one or more projectors, comprising:

• displaying, via a first projector, a first projected image on a screen;
• displaying, via a second projector, a second projected image on the screen, thereby defining an overlap region whereby the first projected image and the second projected image overlap on the screen;
• selecting a first plurality of correspondences corresponding to the first projector and displaying the selected first plurality of correspondences with the first projected image in the overlap region on the screen, the first plurality of correspondences being non-linear;
• selecting a second plurality of correspondences corresponding to the second projector and displaying the selected second plurality of correspondences with the second projected image in the overlap region on the screen such that the each of the first plurality of correspondences displayed on the screen overlap with and correspond to a respective one of the second plurality of correspondences displayed on the screen, the second plurality of correspondences being non-co-linear;
• determining a first mapping from the first projector to the second projector using the first plurality of correspondences and the second plurality of correspondences, thereby defining a common coordinate system among the first projector and the second projector, the first mapping comprising a homography between the first plurality of correspondences and the second plurality of correspondences;
• selecting a third plurality of correspondences corresponding to points on the screen, at least one of the third plurality of correspondences corresponding to at least one of:
• a boundary point;
• a curve;
• a corner;
• or an edge, and being outside of the overlap region;
• and
• determining a second mapping from the common coordinate system to the screen using the selected third plurality of correspondences;
• displaying, via both the first projector and the second projector, an image on the screen based upon the first mapping and the second mapping.

A system for calibrating one or more projectors, comprising:

• a first projector for displaying a first projected image on a screen;
• a second projector for displaying a second projected image on the screen, thereby defining an overlap region whereby the first projected image and the second projected image overlap on the screen;
• and
• a processor configured to:
• select a first plurality of correspondences corresponding to the first projector and selecting a second plurality of correspondences corresponding to the second projector such that the each of the first plurality of correspondences overlap with and correspond to a respective one of the second plurality of correspondences, the first plurality of correspondences being distinct from the first projected image and the second projected image and the second plurality of correspondences being distinct from the first project image and the second projected image,
• determine a first mapping from the first projector to the second projector using the first plurality of correspondences and the second plurality of correspondences, thereby defining a common coordinate system among the first projector and the second projector;
• select a third plurality of correspondences corresponding to points on the screen, at least one of the third plurality of correspondences corresponding to at least one of:
• a boundary point;
• a curve;
• a corner;
• or an edge, and being outside of the overlap region, and
• determine a second mapping from the common coordinate system to the screen using the selected third plurality of correspondences;
• wherein an image is displayed on the screen, based upon the first mapping and the second mapping.

A system for calibrating one or more projectors, comprising:

• a first projector for displaying a first projected image on a screen;
• a second projector for displaying a second projected image on the screen, thereby defining an overlap region whereby the first projected image and the second projected image overlap on the screen;
• and
• a processor configured to:
• select a first plurality of correspondences corresponding to the first projector and displaying the selected first plurality of correspondences with the first projected image in the overlap region on the screen, the first plurality of correspondences being non-co linear;
• select a second plurality of correspondences corresponding to the second projector and displaying the selected second plurality of correspondences with the second projected image in the overlap region on the screen such that the each of the first plurality of correspondences displayed on the screen overlap with and correspond to a respective one of the second plurality of correspondences displayed on the screen, the second plurality of correspondences being non-co linear;
• determine a first mapping from the first projector to the second projector using the first plurality of correspondences and the second plurality of correspondences, thereby defining a common coordinate system among the first projector and the second projector, the first mapping comprising a homography between the first plurality of correspondences and the second plurality of correspondences;
• select a third plurality of correspondences corresponding to points on the screen, at least one of the third plurality of correspondences corresponding to at least one of:
• a boundary point;
• a curve;
• a corner;
• or an edge, and being outside of the overlap region;
• and
• determine a second mapping from the common coordinate system to the screen using the selected third plurality of correspondences;
• wherein an image is displayed on the screen, based upon the first mapping and the second mapping.