Canon Kabushiki Kaisha

Eric Wai Shing Chong

Cameron Murray Edwards

Paul William Morrison

Ben Yip

A method of generating an image, the method including receiving a two-dimensional pattern in the frequency domain, modifying one or more peripheral properties of the two-dimensional pattern and generating the image based on the modified two-dimensional pattern.

Method of encoding and decoding calibration marker identifiers

A computer-implemented system and method of reproducing visual content are described. The method comprises capturing a reference image of a calibration pattern projected on a surface at an initial position and at an offset position, the offset position relating to a projection offset from the initial position by shifting the calibration pattern a predetermined amount; and determining, using the reference image, a spatial capture offset for the calibration pattern between the initial position and the offset position, the spatial capture offset measuring a spatial shift of the calibration pattern in the reference image. The method further comprises determining a scale using the spatial capture offset and the projection offset; decoding a portion of a captured image, the captured image including the visual content and the calibration pattern, to determine a position within the calibration pattern by applying the determined scale, and reproducing the visual content based on the determined position.

Method and system for reproducing visual content

A method for calibrating a projection system having a plurality of projectors, and a camera. The method comprises the camera capturing an image of a calibration pattern projected on to a projection surface by a first projector of the plurality of projectors; determining a projective reconstruction using corresponding points between pixels in the captured image and pixels in the projected calibration pattern; and determining a set of solutions for intrinsic parameters of the first projector, the set of solutions converting the projective reconstruction to a Euclidean reconstruction based on minimization of reprojection error between the camera and the first projector. The method also comprises determining intrinsic parameters of the first projector by selecting the intrinsic parameters from the set of solutions according to a reprojection error with respect to another projector; and applying the selected intrinsic parameters to determine a Euclidean reconstruction of the projection surface.

Calibration of projection systems

A method of aligning two portions of an image, the portions being projected by projectors on a surface to form respective projected portions of the image, a calibration pattern being embedded in each of the two portions, the method comprising capturing from the surface an image of the pattern from the projected portions, the calibration pattern extending across a combined projection area of the projectors; locating an overlap area according to locations of calibration points; determining projector image coordinates dependent upon locations in the overlap area; and aligning the two portions of the image according to the locations of control points and the locations in the overlap area.

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Carlingford, Australia

Eric Wai Shing Chong